grade 7 physics experiments

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1000 science fair projects with complete instructions.

72 Science Projects for 7th Graders

Looking for engaging science fair projects for a middle school science fair? Our handpicked collection of science fair projects for 7th graders is a great place to start!

7th Grade Science Fair Project FAQ

What are some easy 7th grade science fair projects.

Each of these science fair projects are easy for seventh grade science students do. Explore how glow-in-the-dark sticks work, discover how far apart planets really are, and make your own geode crystal with borax!

Chocolate Asphalt

Making Lightning in a Pan

Glow Sticks: Temperature Effects

Geode Rock Borax Crystal

Does Cooking Deplete Vitamin C?

Solar System Scale Model on the Sidewalk

Color and Taste

Uncovering Fall Colors

Growing Mold

Carbonation and Packaging

Science fair project details right above the FAQ!

What is the best 7th grade science project ever?

We love the Fast Food Nutrition project for seventh grade science students. This project encourages students to look more closely at the nutritional value of fast food that's easily available. This project is not only a research project on fast food nutrition, but it also gives middle school students the opportunity to interview willing test subjects about their eating habits.

If you're looking for more 7th grade science projects, check out the 7th grade science fair projects at the top of this page! 

Check out more Best Science Fair Projects →

What are some cool 7th grade science fair projects?

Get ready to be amazed by these super cool science projects for 7th graders! With just a few simple materials, students fascinated by the solar system, how things glow-in-the-dark, unexpected chemical reactions and more, will have too much fun!

Glowing in the Dark

Make Plastic from Milk

The Dissolving Meat Myth

What are 5 testable questions for 7th grade?

A testable question is a question that we can answer through a science experiment. To do this, we do a control science experiment, then we change one thing in the experiment to see how it affects what happens. This is how we can discover the answer to our question!

Here are some testable questions that our seventh grade science projects investigate.

Do detergents affect plant growth?

Can drink and food taste different just by changing its color?

Does the color of light affect photosynthesis?

Does temperature affect seed sprouting?

What makes popcorn pop?

Here are more testable questions along with their science projects →

What are the top 10 science projects for 7th grade?

These are our top 10 science projects for 7th grade, covering biology, chemistry, physics and engineering. Find out how sugary drinks affect teeth, make electricity with your own body or test your design and engineering skills by making a foil bug walk on water! These projects can be used as science fair project ideas or as a fun experiment!

Hamsters and Time of Day

Plant Density and Growth Rate

Water Strider Challenge: Make a Bug Walk on Water!

Human Body Battery

Left-Handedness and Mirror Writing

Making Antibubbles

Soil as an Electrical System

Tooth Decay Experiment with Eggs

Science project details right above the FAQ!

Can I do a 7th grade science fair project in a day?

Yes! Quick experiments or making a model can be a great option for a science fair project! If you want to do a quick science fair project, we have science project ideas on various topics to get you started.

The Solar System: See it in the correct scale!

Create your own sidewalk chalk solar system model and take a walk through space! Solar System Scale Model on the Sidewalk

Chromatography reaction: Separating out colors!

Have you ever wondered why leaves change color in the fall? Let's find out by in this chemistry experiment using chromatography to separate the colors of a green leaf! Uncovering Fall Colors

Heat reactions: Heat speeds things up!

Does the temperature of a room affect how quickly a candle burns? Burn Rate of a Candle

What are some hands-on ways to find inspiration for my science fair project?

There may be free admission days or free passes to a science museum near you! Check your local library for free museum passes, nearby science museums for free entrance days and your credit card for offers.

Find a science museum near you and prepare to be awed by all that you can learn there! I always learn something new and am inspired whenever I go to a science museum!

How do I start a science fair project?

What should I do after I have a science fair project idea?

How do I make a science fair board?

What is the scientific method?

What is the engineering design process?

Where can I find a science fair competition?

The www Virtual Library: Science Fairs website also has a collection of science fairs from all over the world, as well as national, state, regional, local, and virtual competitions!

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Teaching Students About Organic Form

Teaching students about justinian and theodora, michael williams, u.n.c. reports declines in black and hispanic enrollment, educationusa higher education fair 2024, internationalisation experts debate approaches to war in gaza, campus sustainability, research and teaching excellence, smart space optimization, these are the 2 students and 2 teachers killed at apalachee high school in georgia, 43 of the best 7th grade science projects and experiments.

Are you looking for science activities to do with your 7 th graders? No sweat. We have you covered. Check out our list of 43 science projects and experiments that you can try with your 7th graders this month.

• Yeast Metabolism with and without Aeration | Sciencebuddies.org – Grades 6-8 Biology experiment that evaluates the effects of glucose metabolism in yeast.
• Aspirin Absorption in Carbohydrate Solutions | All-Science-Fair-Projects.com – Grades 6-8, Does aspirin absorb into the bloodstream quicker if taken with a carbohydrate food? Test aspirin dissolution in an assortment of carbohydrate solutions.
• Bacteria and Toothpaste | All-Science-Fair-Projects.com – Grades 6-8, Do you know which toothpaste cleans your teeth best? In this project, you will row bacteria from your recently brushed teeth in petri dishes to find out the answer.
• Making Batteries from Fruits and Vegetables | Sciencebuddies.org – Grades 4-7, Use veggie power to build a simple battery from a variety of vegetables. Which ones are the most powerful?
• How Do Roots Grow When the Direction of Gravity Changes? | ScienceBuddies.org -Grades 6-10, Plants respond to gravity by stems that grow upward and roots that grow downward. Experiment with germinating seeds and rotate them to make up down and down up. How do you think the growing seedlings will respond?
• Hydroponics vs. Soil Growth | All-Science-Fair-Projects.com – Grades 6-8, In this project, students find out if plants grow better in soil or a hydroponic solution.
• Puppy Proportions: Your Dog’s Early Months | Sciencebuddies.org – Grades 6-8, Find out how a puppy’s weight, growth, and proportions change early in their lives.
• Do Migratory Birds Like It Hot? | Sciencebuddies.org – Grades 6-8, Pick a species of bird and determine if there is a correlation between air temperature and where and when the birds migrate.
• That’s a Real Smile! …or is it? | ScienceBuddies.org – Grades 6-8, Can people tell the difference between a fake smile and a real one? Gather information from dozens of volunteers to find out.
• Build a Raft Powered by Surface Tension | Sciencebuddies.org – Grades 6-10, Learn about the properties of surface water tension, and use it to propel a raft.
• Paw Preference in Pets | Sciencebuddies.org – Grades 7-10, Are animals left-handed or right-handed like humans?
• Bat Detector: Listen to the Secret Sounds of Bats | Sciencebuddies.org – Grades 7-10, Study the behavior of bats to find out how do they use echolocation to catch their prey
• Saving Migratory Animals | ScienceBuddies.org – Grades 7-10, They’re here today but could be gone tomorrow. Examine the migratory path of a bird species and the similarities and differences between their winter and summer habitats. Recommend which locations should be preserved to protect these species.
• Which Metal Is the Most Resistant to Corrosion? | Sciencebuddies.org – Grades 6-8, Test several kinds of metal exposed to the air, tap water, and saltwater to determine which are the most resistant to corrosion, and which substances are the most corrosive to them.
• Ionizing vs. Photoelectric Smoke Detectors | All-Science-Fair-Projects.com – Grades 6-8, Learn how smoke detectors work, and compare the effectiveness of ionizing smoke detectors to photoelectric smoke detectors.
• Robot Movement | Education.com – Grades 6-8, Construct a robot equipped with sound/touch sensor circuitry. Run it through a maze to find out if it displays sequential or random movement.
• Repurposed Designs | Education.com – Grades 6-8, Identify items that need repurposing such as e-waste, batteries, and mattresses. Then get creative and Invent your own original repurposed design.
• Solar-Powered Robot Bug | Sciencebuddies.org – Grades 6-8, Explore electronics and solar energy by building the Frightened Grasshopper, a solar-powered bug.
• Stressed Out with Beams | Sciencebuddies.org – Grades 6-8, Test the load-bearing capacity of several types of beams, including I-beams, U-beams, rectangular beams, and T-beams.
• Build a Gauss Rifle | ScienceBuddies.org – Grades 6-8, Use magnets and ball bearings to build a rifle based on magnetism. Investigate how many magnet and ball bearing “stages” affect the velocity and distance of the projectile.
• Smart Medicine Cabinet | ScienceBuddies.org – Grades 6-8, Do you know someone who needs to take medication daily? Create a sensor that reminds patients when to take their medication.
• electromagnet?
• Grow the Best and the Largest Crystals | Sciencebuddies.org – Grades 6-8, Figure out the best temperature for making the largest, purest crystals using water and borax.
• What’s the Fastest Way to Cool a Soda? | ScienceBuddies.org – Grades 6-8, Experiment with different ways to cool a can of soda.  Find out the fastest way to get your tall cold drink.
• How Much Potential Energy Do Different Nuts Have? | Education.com – Grades 6-8, Explore the energy of living things. Prove that different varieties of nuts produce electricity in a series of experiments.
• How Salty Does the Sea Have to Be for an Egg to Float? | ScienceBuddies.org – Grades 6-8, Figure out precisely what concentration of salt in water is required to make an egg float.
• Washing Detergent & Hydrophobic Soil | Education.com – Grades 6-8, Some soils do not absorb water very well.  Find out why and if washing detergent and change their ability to absorb water.
• Make Your Own Psychrometer | Sciencebuddies.org – Grades 6-8, Make a psychrometer to measure relative humidity, then use it to measure RH in a variety of weather conditions.
• Do Our Storm Drains Keep the Ocean Trash Free? | ScienceBuddies.org – Grades 6-8, Test your local grated storm drain inlets to see if they’re up to the task of keeping plastic litter out of your community’s stormwater drainage system. If they’re not, work on improving the design.
• Can Water Float on Water? | ScienceBuddies.org – Grades 6-8, Can liquid water float on liquid water? Investigate how the density of water is affected by its temperature and salinity.
• What Weather Factors Create Radiation Fog? | Sciencebuddies.org – Grades 6-8, Make systematic observations about the weather conditions needed to create radiation fog. Can you forecast when and where it will occur?
• The Science Behind Tsunamis | Sciencebuddies.org – Grades 6-8, Study the effect of water depth on wave velocity. Learn how tsunamis form and create your own simulation model wave tank to generate a tsunami.
• Killing ‘Vampires’: Saving Money and Power | Sciencebuddies.org – Grades 6-8, In this project, you’ll identify electricity “vampires” in your home, such as computer peripherals and electronic equipment, that use power even when not in use. Find out exactly how much energy they use. Use this eye-opening data to help your family save money on electricity.
• Which Wheels Work Best? | Education.com – Grades 6-9, Experiment with how different kinds of wheels affect the speed of a skateboard.  You’ll calculate friction co-efficient and its correlation to velocity.
• Test the Efficiency of a Solar Cell? | Education.com – Grades 6-9, Find out how much of the energy from the sun that reaches a photovoltaic cell is changed over into electricity.  Predict how to position solar cells for maximum conversion.
• How Acidic Waters Make Rocks Disappear | Sciencebuddies.org – Grades 6-10, Soak some limestone rocks in varying amounts of acidic water.  Determine how much acidity is needed to make them dissolve.
• Seafloor Spreading | Education.com – Grades 6-12, Use an oatmeal box and some paper to demonstrate seafloor spreading.
• Storytelling Alice | Sciencebuddies.org – Grades 6-12, Create your own computer-animated story using Carnegie Mellon’s 3D programming software. You’ll learn computer programming with easy-to-use drag and drop tools.
• Modeling Darcy’s Law | Education.com – Grades 6-12, Model the underground movement of water, utilizing Darcy’s Law.
• Globular Clusters | Sciencebuddies.org – Grades 7-10, Explore “star gangs” in the Milky Way and beyond. Globular cluster are compact groups of about a million stars that move around in galaxies. Use statistical data to learn how globular clusters help us better understand the universe.
• Demonstrating the Separation of Mixtures | Education.com – Grades 7-10, Separate recycled objects to illustrate how mixtures are created.
• Customize Your Own Drum Set! | ScienceBuddies.org – Grades 7-10, Build a drum set using household materials, a computer, Scratch, and a PicoBoard. Program your drum set to create a synthesized Hip hop, rap, classical, techno, or electronic drumbeat.
• Harmful Algal Blooms in the Chesapeake Bay | Sciencebuddies.org – Grades 8-12, Harmful algal blooms affect the quality of water and impact people, marine animals, and birds. Study how water quality changes before, during, and after algal blooms.

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Science Fair Ideas for 7th Grade – 60 Perfect Projects

June 27, 2024

If your 7th graders are preparing for the science fair, it’s possible that you’re looking for some ideas to get them started. With these 7th grade science projects, your students will be sure to feel inspired and ready to begin. These science fair ideas for 7th grade include projects related to biology, health & psychology, environmental science, chemistry, physics, and engineering.

Things to consider – Science fair ideas for 7th grade—60 perfect projects

Each of these projects is ranked according to “difficulty” and “materials.” You can consider these rankings as you decide which to share with your 7th grade students.

Difficulty : How advanced is the project? Do your 7th graders have enough time to complete it? Each project is rated “basic,” “medium,” or “advanced” based on the complexity of the concept and the amount of time it will take.

Materials : These projects also range in terms of the complexity of the materials and setup, and are ranked as “basic,” “medium,” or “advanced.”

Biology – Science Fair Ideas for 7th Grade—60 Perfect Projects

1) extracting dna from onions.

  Can DNA be studied separately from other cell components? In this experiment, students creatively use a variety of household supplies to learn more about DNA, an important biology concept.

• Difficulty: advanced
• Materials: advanced
• Learn more: onion DNA extraction

2)  Grow box design

  Build a grow box (or series of grow boxes) for plants using cardboard, foil, and a plug-in light source. Students can test the effectiveness of the grow box when variables are changed, such as light source strength and box size. After this experiment, your students can invite plants into their homes or the classroom all winter long.

• Difficulty: medium
• Materials: medium
• Learn more: DIY grow box

3) Collect biofilm

  Biofilm is comprised of microscopic bacteria accumulating on objects in the water (you might notice it rivers, swimming pools, or even on the surface of teeth). Students can quantify biofilm by building a collector. They can also experiment with ways to reduce it.

• Learn more: biofilm experiment

Science Fair Ideas for 7th Grade – 60 Perfect Projects (Continued)

4) plants and phototropism.

  Do plants really grow towards light? Discover more about how plants respond to light through this simple experiment.

• Difficulty: basic
• Learn more: phototropism

5) Nitrogen and plants

Explore the important role of nitrogen in plant growth with this science fair project. The experiment involves comparing the growth of pea plants with and without nitrogen-fixing bacteria.

• Learn more: nitrogen and pea plants

6) Bubble cell membranes

  If you’re looking for a fun way to teach 7th graders about cell membranes, consider using bubbles. Through this lab, students investigate the behavior of bubbles and apply it to cell membrane characteristics.

• Learn more: cell membrane bubble lab

7) Test Darwin’s theory

  With this lab, students repeat Darwin’s “survival of the fittest finch” experiment for a fun and interactive way to learn about natural selection and evolution.

• Learn more: natural selection lab

8) Carbon cycle experiment

  Help your 7th graders learn about processes of photosynthesis and respiration through this project that combines biology and chemistry concepts.

• Learn more: carbon cycle experiment

9) Test for germs

  What’s the dirtiest place in the kitchen? The refrigerator handle? The coffee machine? The sink? Students can guess, though it might not be what they think. Swab household items and store the samples over several days to find out.

• Learn more: germ experiment

10) Cell size lab

  In this project, students can analyze surface-area-to-volume ratios using beets and bleach, demonstrating how small cells are more efficient at moving materials in and out.

• Learn more: cell size lab

Health and psychology – Science Fair Ideas for 7th Grade

11)  colors and memory.

  Find out how color affects memory by asking volunteers to recall simple words on differently-colored construction paper.

• Materials: basic
• Learn more: color influencing memory

12) Measuring tooth decay

  Since eggshells share similar properties to teeth, your students can use them to test how different beverages erode tooth enamel. This project teaches biology concepts while also encouraging healthy eating and dental care.

• Learn more: tooth decay egg experiment

13) Cooking and Vitamin C

  Do cooked fruits and vegetables have less Vitamin C than raw ones? This is another good experiment for your students interested in nutritional science. This project involves a slightly more complex procedure, so it’s also perfect for your advanced 7 th grade students.

• Learn more: Vitamin C determination

Science Fair Ideas for 7th Grade (Continued)

14) caffeine and typing.

  Does a jolt of caffeine help you work more efficiently? Test this out through typing with this 7 th grade science experiment. Your 7 th grade students can run this test with mild forms of caffeine, such as soda or a piece of chocolate.

• Learn more: caffeine and typing

15) Psychology and texting language

  If you teach 7 th graders, you may have heard them speaking in texting-speak. Have these texting abbreviations become a full language? With this project, your 7 th grade students can create a text-language glossary and study its practical applications.

• Learn more: is texting a new language?

16) Test calorie counts

  Where does the calorie number on packaged foods come from? Try this experiment with a variety of foods to help your students understand how food energizes us.

• Learn more: test calorie counts

17) Balloon lung capacity

  Using a balloon and a tape measurer, students can measure lung capacity, which has a number of health implications. It can be made more or less complicated depending on the measurements taken (circumference vs. volume of the balloon, for example).

• Learn more: measuring lung capacity

18) Myers-Briggs and memory

  Are your students interested in exploring questions of psychology and memory? This experiment involves asking volunteers to take a Myers-Briggs personality test, followed by a simple memory exam. They only need internet access and willing volunteers.

• Learn more: memory and personality

19) Flexibility experiment

  There are a number of reasons for stretching, including reducing chances of injury and feeling calmer. But does stretching actually make us more flexible? Find out by comparing flexibility before and after stretch exercises. Students can test volunteers after holding the stretches for different lengths of time.

• Learn more: flexibility experiment

20) Sleep and memory

  Can sleep deprivation affect memory? Your students can find out by quizzing volunteers on trivia studied beforehand after 8 or 5 hours of sleep. While this project takes some planning, organization, and willing volunteers, it’s a fun way to promote healthy sleep habits.

• Learn more: sleep and memory

Environmental science – Science Fair Ideas for 7th Grade

21) water filtration.

Create a charcoal filter in order to better understand water filtration systems. Afterwards, students discuss the science behind clean drinking water, as well as its environmental implications.

• Learn more: charcoal water purifying experiment

22) Acid rain and plant life

  Does acid rain negatively affect plants? Students can test this environmental concern using vinegar. Advanced students can also experiment with different pH levels for a more complex project.

• Learn more: acid rain experiment

23) Ocean acidification

  For another project related to acidification, students can make stimulated ocean water and test its effects on seashells.

• Learn more: ocean acidification lab

24) Test the greenhouse effect

  Though the greenhouse effect can help planet Earth to stay at a livable temperature, it also causes harmful global warming when enhanced by excess greenhouse gases. With this model, students can see the greenhouse phenomenon in action, and discuss how humans could reduce greenhouse gas emissions.

• Materials: simple
• Learn more: greenhouse effect experiment

25) Grow garbage plants

  Grow plants using different kinds of compost and garbage to see which kind of matter facilitates the quickest growth. This project is a great way to teach about composting and sustainability.

• Learn more: growing plants in garbage

26) Water cycle bags

7th grade students can learn more about the water cycle with only a Ziploc bag, food coloring, water, and a marker. Once these water cycle bags are created, they can be hung by a window and checked throughout the following days. Students can observe and record a miniature water cycle happening before their eyes. For more complexity, they can check it at different temperatures.

• Learn more: water cycle bags

27) Glacier ice-cutting

For a demonstration of how glaciers melt from pressure, try this ice-cube-cutting experiment. Mix it up by timing the process with differently sized ice-cubes and weights.

• Learn more: ice cube vs. wire

28) Water quality testing

  A simple water testing kit opens numerous possibilities for science fair projects, including testing the water quality of local streams, ponds, swimming pools, and drinking-water taps. If students don’t have water testing kits on hand, they can purchase them for under $30. This is a perfect way to teach about the importance of clean water sources.

• Learn more: water quality experiment

29) Algae growth

  Teach students about fertilizer runoff and its harmful impacts on local waterways through this experiment, which has students test the effects of pollutants on algae growth using household fertilizers.

• Learn more: algae and pollution

30) Bird watch

  Project FeederWatch is perfect for students who might take an interest in ornithology. It only involves putting a bird feeder outside and recording the number of visitors. For more complex studies, students can take on Feeder Design Challenges .

• Learn more: bird feeding with Project FeederWatch

Chemistry – Science Fair Ideas for 7th Grade

31) slime design.

  Chances are, you already know that middle school students love slime. Turn the fascination into a learning activity by experimenting with chemical properties to create the best slime.

• Learn more: how to make slime

32) Mummify a hot dog

  Students can understand the chemical processes involved in mummification by completing this simple experiment.

• Learn more: hot dog mummification

33) Eggshell chalk

Your 7th graders can make their own sidewalk chalk by using the calcium in eggshells. They can change variables (flour type, water temperature, etc.) to see which chalk is the most long-lasting or water-resistant.

• Learn more: make your own eggshell chalk

34) Homemade ice cream

  The secret to making ice cream is to lower the freezing point of ice. The secret to this secret? Salt. With this experiment, students can have delicious vanilla ice cream ready in about 20 minutes. Test different ingredients for the creamiest results.

• Learn more: homemade ice cream

35) Saltwater and density

Explore salinity by making an egg float or sink in water with various salt levels. You can base your salt levels on notorious salty bodies of water such as the Great Salt Lake (6-27% salt water) and the Dead Sea (34% salt water).

• Learn more: egg float science experiment

36) Oxidation experiment

  Ever wondered how to slow or prevent rusting? Rusting occurs through a process of oxidation, which can be slowed using different liquids. Test how saltwater, freshwater, and other liquids affect oxidation on common metal objects (paper clips, staples, coins, etc.)

• Learn more: does it rust?

37) Static water bending

  Change the flow of water just by combing your hair and then holding it next to a stream of water. How far can you bend the water by combing your hair for different lengths of time? This is a great way to help 7th graders understand static electricity.

• Learn more: bending water experiment

38) Blow bubbles

  Yes, bubble-blowing can be a science fair project. Ask your students to test how temperature affects bubble life through this fun experiment.

• Learn more: bubble life and temperature

39) Red cabbage pH indicator

  Explore chemistry by testing the pH of liquids such as vinegar, milk, and coffee. You’ll need cups and bowls, and of course, red cabbage.

• Learn more: red cabbage indicator experiment

40)  Plate coins with copper

  Create copper-plated coins by extracting copper from a solution, through processes of electrolysis and electroplating . This is a fun way to combine chemistry and electrical engineering.

• Learn more: copper plated coins

Physics Projects – Science Fair Ideas for 7th Grade

41) balloon temperature.

  Using this simple and visual balloon experiment, students can better understand how air expands when heated, a basic component of thermodynamics.

• Learn more: balloon temperature experiment

42) Floating tea bags

  To teach your students about heat and its effects on air molecules, give them this tea bag experiment. Since this project involves fire, you should make sure your students have adult supervision while conducting the experiment. It’s also great for a class demonstration.

• Learn more: floating tea bags

43) Build a parachute

  7th graders can learn about speed, velocity, and acceleration by crafting their own parachutes. They can use different bag materials to test for a smooth fall and graceful landing.

• Learn more: build a parachute

44) Solar-powered oven

Teach your students about thermal energy, reflection, and convection through this fun project. Test the oven on a warm sunny day for delicious results (s’mores).

• Learn more: build a solar oven

45) Swing a glass of water

  This is a great way for 7th graders to learn about centripetal force. The goal is to swing glasses of water over their heads without spilling the water (we recommend doing this experiment outside since it has the potential to get messy).

• Learn more: centripetal force experiment

46) Instant ice

  Through this experiment, your students can experiment with instant ice. For variations, try leaving the water in the freezer for different times, or using other liquids.

• Learn more: instant ice experiment

47) Rainbow density tower

  Teach about density using this simple project with a beautiful outcome. Once students have created their density towers, they can test the density of other objects ty tossing them in (how far will a coin sink? A peanut? An egg?)

• Learn more: density tower

48) Separate hot and cold water

  For another density-related experiment, try separating water by temperature. Students can run the test with the hotter (less density) on the bottom and colder (more density) on the top, and then vice versa.

• Learn more: separating hot and cold water

49) Physics of sound

  It turns out that sound has physical matter. Students can demonstrate this by blowing out a candle using only sound vibrations, which move through an oatmeal box.

• Learn more: discovering sound matters

50) Graphite circuit

  For another electricity-focused experiment, challenge your students to create an electrical circuit using pencil graphite. Since it involves drawing, students can put their art skills to use for a beautiful result.

• Learn more: graphite circuit

Engineering Projects – Science Fair Ideas for 7th Grade

51) pet auto-feeder.

  For a more advanced project with practical application, have your students build this automatic pet feeder. Some coding is involved, which could interest your computer-engineering-oriented students.

• Learn more: auto-feed your pet from anywhere

52) Balloon-powered car

  To help your students learn about engineering design and kinetic energy, suggest that they build a balloon car out of materials likely found around their homes. They can experiment with different wheel and balloon sizes to see how fast the car can go.

• Learn more: Newton’s balloon car

53) Build a geodesic dome

A geodesic dome is a thin-shell structure created out of triangular elements, which help it to withstand heavy loads. This experiment utilizes geometry concepts and it only requires paper and masking tape (students can play with different types of paper and tape as variables).

• Learn more: geodesic dome

54) Da Vinci’s bridge

  This bridge-building project is inspired by Leonardo da Vinci’s self-supporting wooden bridge. Your students will only need pencils and rubber bands (not to tie the pencils together, but to make sure they don’t slip). Test the bridge with different objects to see how much weight it can take.

• Learn more: Da Vinci’s bridge

55) Tensegrity structure

  Understand the mechanics of tension by making this functional floating structure that’s mind-boggling to look at. You will need string, popsicle sticks, and some patience for exact measurements.

• Learn more: anti-gravity structure

56) Make a water clock

  In this engineering project (which has been around since ancient times), students can create a clock from plastic cups, a small bell, yarn, and several other common craft items.

• Learn more:   water clock

57) Design a pinball machine

  Your 7th grade students can create functioning parts for a homemade pinball machine using objects found at home or in the classroom. They can test for speed and materials as they craft their own game.

• Learn more: homemade pinball

58) Rubber band helicopter

Students can learn about helicopter mechanics by constructing this flying and rubber-band-powered toy.

• Learn more: rubber band helicopter

59) Crash cars

This experiment involves building cars and then crash-testing them with raw eggs inside as “passengers.” What structures best protect the egg? Beware: this one could get messy.

• Learn more: car crash project

60) Build an electricity generator

  For another electrical engineering project, students can create an electric generator. Challenge them to test the generator using different materials for different results.

• Learn more: energy generator

Final thoughts – Science Fair Ideas for 7th Grade

Hopefully your 7 th grade students will find projects to get excited about from this list. For more classroom resources applicable to middle school students, we recommend the following articles:

• 124 Good Icebreaker Questions for Students/Adults
• 141 Fun, Weird, & Interesting Facts
• 102 Fun Last Day of School Activities
• 56 8 th Grade Science Fair Projects
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With a BA from Wesleyan University and an MFA from the University of Illinois at Urbana-Champaign, Sarah is a writer, educator, and artist. She served as a graduate instructor at the University of Illinois, a tutor at St Peter’s School in Philadelphia, and an academic writing tutor and thesis mentor at Wesleyan’s Writing Workshop.

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30 Ideas For 7th Grade Science Fair Projects

By Beth Roberts | Last Updated May 4, 2022

We’ve compiled some of the best seventh grade science fair projects for your convenience! These science fair project ideas for 7th graders are sure to get you inspired and ready to do go on your own amazing research. We’ve also provided a list of resources you can use at home or in the classroom that will help give you tips on how to start your project, how to present it, and how to write an awesome science fair paper.

1. Drive A Balloon-Powered Car

This is an easy to build science fair project that you can even do with your younger brothers and sisters. You will need a high-quality balloon, scissors, tape, paperclip and a ruler.

First you will want to cut off the end of the balloon just above where half of it already has a hole in it. Then thread the tape through the hole so that it is on one side and stick the paperclip through it (close to the bottom of the balloon). Now take your ruler and measure how long it is going to be. When measuring however, you have to make sure that you are going to cut past where half of your paperclip is.

2. Make A Bionic Hand

This project involves making a bionic hand out of rubber and plastic parts and will involve cutting, gluing and soldering. You will want to be careful when cutting this project as you can seriously injure yourself if you cut too close to the plastic so make a good outline before doing it. First you will want to find out how big your hand is going to be. Then draw that on the rubber sheet with a pencil (minus the thumb where it will be). Measure how long your hand is going to be from top to bottom then measure 1/4″ from all 4 sides (you want 4 measurements).

3. Do An Experiment On The Physical Properties Of Water

This seventh grade science fair project assumes you already know some things about the physical properties of water. You will want to do this experiment with a partner who also knows some things about water. First you will want to find out whether or not your partner is willing to do this experiment with you and then measure out how many 1/2 cups of water there are in a gallon. Then take a sample of that and measure it again, this time in 1/4 cups. Then you will want to find out how many 4 oz cups are in your sample, then 1 cup and then 2 cups. Now take your results and do what is called an average of those measurements in a data table like this.

4. Make A Tornado In A Bottle

This project is somewhat easy but it may take some time to get right . You will want to do this by yourself as you can be seriously injured if you do the wrong thing. First you will want to take your empty soda bottle and rinse out all of the soda from it. Then make sure there is no water left in the bottle from rinsing it then soak it in water for about 20 minutes. After your 20 minutes are up, shake the water out of the bottle, but make sure you leave enough that it will not leak out as soon as you put in your dry ice (if you use dry ice).

5. Sorting Jellybeans is a Fun way To Learn about Heredity.

Use the following pointers to sort jellybeans :

a. Jellybeans come in blue, yellow, orange and pink jellybean colors (you can use colored paper and a different color of pen)

b. Jellybeans are round (you can use a ruler)

c. The outside edge of each jellybean is the “seam” that runs down the middle of the jellybean (you will be able to see this clearly after you fill the bag) 

6. Allow A Teabag To Float In The Air

This experiment is best done outside. First you will want to take a tea bag and put it in a glass of water , then carefully place it on top of the water in the cup. Make sure there is plenty of room between the cup and the tea bag (this will allow for air to circulate and help it to float). Watch as your teabag floats in mid-air!

7. Make A Slime Bomb

This science fair project is best done with an adult or older kid . You will want to find out what chemicals to use for the slime (you can search the internet for that) and then make it. It is best if you have a friend who knows how to make slime with you, too!

8. Build A Mini Catapult And Launch Yourself Across The Room

This science fair project can be fun , but it does take some time to get right. You will need several objects to build a mini catapult out of: a small stick, tape, string, paperclips and cans (for launching).

9. Make A Vacuum Cleaner Powered Fan

This science fair project is fun , but it can be dangerous. You will want to do this in an area where you do not have many dangerous electrical cords nearby and make sure you can easily get out of the way if it starts to fly off the ground. You will need a fan, a handheld vacuum, scissors and paperclips. First you will want to take apart your handheld vacuum and find the blade part of it. You will want to cut out about 1/2″ of the rubber around the blade. Then tape that on one side of your fan (make sure you have 2 blades facing each other).

10. Make A Solar Oven Design.

Students explore thermal energy, reflection, convection, and other physics principles as they experiment with the best way to create a solar oven . They’ll be able to serve up their experiment findings as well as their final reports!

11. Make A Rocket Powered By Dry Ice.

This is a science fair project that is best accompanied with someone who has done this before. You will want to make sure you are in an open area where you can easily get out of the way if it does not work.

First you will want to use a craft knife to cut out the bottom part of a soda bottle, making sure that you leave about 1/4″ on the bottom so it does not leak. About halfway up you will want to then cut off another part (this will be used for your air intake) and make sure your intake side is smaller than your exhaust side. Cut as close as possible so that they are seamless together.

12. Make Your Own Lava Lamp

This is a fun science fair project that involves melting wax and oil together . You will want to make sure you have something to put this in (a bottle, jar or plastic cup would work). You will need: red food coloring, water, dish detergent, oil (olive or vegetable), and that small globe from a lava lamp you might have lying around the house.

13. Take A Look At How The Greenhouse Effect Works.

The greenhouse effect is a natural phenomenon that can be observed in the Earth’s atmosphere on a daily basis. Many people are unaware of how it works and how much it affects our lives. This project encourages students to gain a better understanding of the greenhouse effect and its impact on Earth’s temperature.

14. Use Water Color To Make Your Own Kaleidoscope

You can use a permanent marker, paint or crayon. By varying the size and shape of the dots, you can create many different patterns in your result. Study how light is reflected in two and three dimensions of the pattern.

15. A Dense Rainbow Is Awe-Inspiring.

Density is the same as mass divided by volume . It is a measure of how tightly packed together molecules of matter are. This project forces students to learn about density in order to obtain a rainbow of monochromatic liquids in graduated cylinders that vary in size. The light source and liquid arrangement allows them to observe the density spectrum of each liquid.

16. Use Charcoal To Purify Water.

Water is one of the most important substances on Earth . It keeps us alive, purifies us and is also used to grow crops. Many people do not have access to clean drinking water and this project will help them by guiding them in the creation and use of charcoal for use in a filter for water purification.

17. Find Out How Energy Is Transformed.

Energy can be transformed from one form to another , but often loses some of its original properties. This project highlights the effects on a car battery if it is connected to a series of light bulbs and a conducting wire.

18. Make Your Own Tesla Coil.

Invented by Nikola Tesla in 1891, the Tesla Coil is an electrical resonant transformer circuit capable of producing extremely high voltages using an air-core transformer based on two spark gaps and two capacitors that allow alternating current through the primary coil to build up an oscillating high voltage in the secondary coil without requiring any type of power source with wires directly attached to it like you would find in conventional coils.

19. Coat Some Coins With Copper.

Copper-plating gives a metallic luster and color to many things , such as coins, jewelry, and even small kitchen utensils. In this project, students will use copper sulphate solution to convert a penny into a shiny plated coin.

20. Play With Hydraulics To See What You Can Come Up With.

Hydraulics is the study of fluids at rest or in motion and the mechanical devices that are directed by them. This project will allow students to learn about how pressure and force can be used to create movement and power.

21. Biofilms Should Be Collected And Managed.

Biofilms are naturally occurring communities of microorganisms , usually bacteria but also fungi and algae cells. Biofilms are found in almost all natural environments and on most man-made surfaces. They consist of living microbes that can persist for long periods, while producing tranquil points which may be as much as 100 times greater than their own area. This project introduces students to biofilms in order to encourage them to observe how they grow and how they are treated during the experiments.

22. Using Experiment Kits On Baking Soda And Vinegar, Make A Volcano.

An erupting volcano is an impressive sight to many people , but they are also extremely dangerous! In this experiment, students will learn about what causes volcanoes to erupt and what type of rocks are needed to build them with their own hands.

23. Crystals Are Fun To Grow And Play With.

Crystals are beautiful, fascinating and useful . Students will learn about how crystals grow by experiencing it themselves and observing the different ways they can form, with the help of a variety of experiment kits. This is a hands-on science experiment that encourages students to be creative, experience sensory impact and develop an intuitive understanding of materials as they work with them in real time.

24. Explore The Laws Of Motion Using A Spinner.

Gyroscopes are used in many aspects of our everyday lives . You know them as small spinning wheels that come with every electronic device nowadays, but their uses extend from guiding missiles and rockets in flight, to balancing boats and planes, to keeping your computer monitor from falling over on its side.

25. Make A Simple Breadboard To Use A Battery And Then Attach LEDs.

A breadboard is a board which allows you to connect multiple electronic components on one side . This project uses simple components to demonstrate the use of electricity in real time. You will need some type of battery and some LEDs, but you can buy these items at a local hardware store in addition to assembling the parts yourself.

26. Make A Simple Musical Instrument Using Simple Items.

A musical instrument is any object that is used to make music . In this project, students will use an empty plastic water bottle and some chopsticks to make a simple musical instrument; they will explore the laws of vibration by experimenting with a variety of sounds.

27. Make A Paper Airplane Which Can Fly.

A paper airplane is an aircraft designed to fly by being thrown . There are many variations of paper airplanes, but they all rely on the same basic structure and usually only require a piece of paper or thin cardboard. In this project, students will learn about aerodynamics as they build their own paper airplane.

28. Build A Storage Bin Using Recycled Materials

Storage bins are used to store clothing or other things that you do not need to use regularly but still want to keep around. This project will help students learn about the different shapes of storage bins and the ability they have to store things while being used in real time.

29. Make A Simple Compass.

A compass is a tool used to measure direction and orientation . It is used for navigation and orienteering. This project will help students explore the earth’s magnetic field using simple materials to create their own homemade compass.

30. Make A Rock Tumbler And Use It To Polish Rocks.

Polishing can be a valuable skill that provides aesthetic value and shiny, smooth surfaces for your household items. In this experiment, students will explore various sources for polishing rocks, as well as using their own creativity to create dazzling results in real-time during the experiment itself.

The field of science is vast and varied, with many different types of projects that students can engage in to learn about the world around them. Science projects can be engaging for students and teachers alike if they are designed to provoke a level of interest and excitement about what students are learning. It is also important to consider that science is not only limited to the four corners of a book or classroom; it is all around us, literally everywhere!

This means that there may be opportunities for children to learn while they are waiting in line at the bank, watching television at home, or even while they are otherwise being entertained.

15 Fascinating Science Experiments for 7th Graders

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Whether it’s for the science fair, extra credit, or just exploration, there are plenty of fantastic science experiments that seventh graders can do. Here’s a roundup of 15 fascinating science experiments for 7th graders or any child of any age really who is interested in discovering something new!! These are some of the best experiments shared across the web that are definitely worth trying.

15 Fascinating Science Projects for 7th Graders…..and beyond. 

#1 – check out charcoal’s purification abilities.

This experiment demonstrates how charcoal powder, or activated carbon, purifies water. Charcoal is used in many water filtration systems, but seeing it in action is quite impressive–and all you’ll need is activated carbon, dirty water, and a few jars! Click here for instructions.

#2 – Determine If Mint Is Actually Cooling

Sure, mint always leaves your mouth feeling cooler–but does it actually cool it down? Get the details with this fun experiment that only requires some hot water, a thermometer, and some breath mints to setup. Click here for instructions.

#3 – Experiment with what plants grow best in your home in a homemade grow box

This is such a fun experiment that your kids will love to do! Pick a various amount of seeds to plant and experiment to see which one comes up first, which one produces first etc. The possibilities are endless.  Click here for instructions.

#4 – Harness The Power of the Sun

Design the most powerful “solar oven” you can using whatever materials you have on hand–like a pizza box and some aluminum foil. Then, test the effectiveness of a few different designs and make calculations regarding how long it takes each oven, at what outdoor temperature, to melt a bar of chocolate in direct sunlight. Click here for instructions.

#5 – Measure The Effectiveness of Different Insulations

Have you ever noticed how quick ice melts when you carry a cup or glass outside? You may have even noticed that ice seems to melt more slowly when placed in a foam cup compared to a paper or plastic one. In this experiment, you’ll put these materials to the test to measure the effectiveness of each type of insulated cup–ranging from a normal glass to a cups with and without lids. Click here for instructions.

#6 – How Does Color Affect Your Memory

Are certain colors more memorable or stick out more than others? Find out with this awesome science project to see if your brain remembers things better if they are in certain colors!!  Click here for instructions.

#7 – See If You Can Prevent or Delay Rust

Rust is the result of corrosion, which occurs when moisture meets bare metal. It has long been a problem in the automotive industry and countless other fields–so what can we do to prevent or delay it? Test this out by using various products and substances (such as coatings and special paints) on clean metal and then dropping the metal into water to see what rusts the quickest. Click here for instructions.

#8 – Measure The Impact of Caffeine

Caffeine is a known stimulant and it can certainly give you a kick of energy in the morning, but does it really improve your speed or productivity? In this experiment, you’ll get to explore just how caffeine effects the body and if it really has any improvement over speed and efficiency. A typing test is a great way to measure results! Click here for instructions.

I am not an advocate of caffeine on a regular basis but discovering what caffeine does to your body could be an interesting experiment. An experiment could be done with how it affects different people differently. 

#9 – Find Out If Stretching Matters

Everyone tells you to stretch out your muscles for improved flexibility, but does stretching really make a difference? Find out by measuring flexibility before and after various stretches. Click here for instructions.

#10 – Use Cabbage to Test pH

Measuring the alkaline or acidic content of a substance doesn’t require pH strips. In this experiment, you’ll just boil down some red cabbage and use it to measure the pH of various items. The rule is simple: acids turn red and bases turn green! Click here for instructions.

I remember doing this experiment in elementary and then again in High School. Posters were updated and we ended up taking second place in High School…HA HA!! 

#11 – How Much Salt Does it Take to Float in Water???

This is an easy and fun experiment to do with eggs. You will discover how much salt it takes to allow yourself to float in water without sinking. Click Here for Instructions

#12 – See What Else Floats (or Sinks)

Most people know that oil floats in water, but the point of this experiment is to see where everything else falls. You’ll just need to take a few different substances and put them in a tall pitcher. Figure out the right order and you can make a rainbow! Click here for instructions.

#13 – Build a Generator from Scratch

Anyone can plug into a potato, but how about building a real electricity generator? With a few basic supplies, you can figure out how to do just that in this exciting science experiment. You can also easily expand upon this experiment by trying various things with the generator you build. Click here for instructions.

#14 -What do Sugary Drinks do to Our Teeth

Find out with this fun Science Experiment what sugary drinks do to your teeth! This experiment may have you think twice about how much sugary drinks you actually consume! Click here for instructions.

#15 – Testing the Effectiveness of Sunscreens

There are so many sunscreens on the market and some work better than others!! This is a fun experiment that can benefit others with your findings!! You can buy little beads that change color when placed under ultra violet light  Click here for instructions.

I hope you have found at least one in this list of science experiments for 7th graders and beyond!! 

Kids Art & Craft

Science fair projects & experiments for grade 7.

School Crafts

If you’re searching for science projects for science fair projects and experiments in 7th grade, you’re in right place! Keep your learning spirit alive with our curated list of science fair projects and experiments like teabag rocket, greenhouse effect & global warming, burning calories, acids & bases, water purifying, making a barometer, students who love games, bean classification, oxidation, and make lip balm.

Science Fair Projects & Experiments for Grade 7

Read More: DIY Recycled Magazine Bangle Ideas

Basic Drinking Fountain Craft Project For Kids

Image Source/Tutorial: Kids Art & Craft

This basic drinking fountain craft for kids is a fun and creative way for kids to explore science and engineering principles. It helps them understand how water pressure works and the principles of water flow. It is a great way to encourage learning and creativity.

Simple Dyed Water Rainbow With Science Experiment

Image Source/Tutorial: KidsArt&Craft

This science experiment is a great way to teach kids about the color spectrum. It’s simple to conduct and just takes a few materials such as food coloring, water, and a few other items. With this experiment, kids can create a colorful rainbow with dyed water and learn about light refraction in the process.

Crafting a Handprint Science Project Craft For Kindergarten

This project takes the classic handprint craft to a new level. Using a few simple supplies, kindergarteners can create a science project that teaches them about the human body and its functions. It’s an easy and fun way to get kids interested in science.

Tea Bag Rocket Ideas For Kids

Image Source/Tutorial: Coffee Cups and Crayons

Do cool science experiments excite you too? If yes, then this amazing science activity will not let you down! You will see the tea bags flying on their own! This will let the children learn about the heat energy between fire and flying! You will be able to learn this activity just by a tea bag, matches, a bowl, and a plain surface and you can perform this activity to stun everyone! This activity is not messy, unlike most science experiments!

Greenhouse Effect And Global Warming Activity

Image Source/Tutorial: Teaching Science With Lynda

Teach the student greenhouse effect, climate change, and global warming in a smart and easy way! Use this activity to learn about these topics and their effects easily! This activity will also lead the students to a science investigation! Let the students use their innovative creativity with the help of this activity idea and let them out their inner creative scientists! An interactive science model always helps!

Burning Calories Science Projects

Image Source/Tutorial: Science Buddies/Calories Experiment

Build your own calorimeter with us! This science activity will help you make your own calorimeter and you will get to know the amount of calories a particular food contains! You will have to burn the food to capture the energy as in literally  ‘burning calories’! Do this cool experiment and stun everyone! Also, share this experiment with your friends and show off your knowledge!

Acids And Bases Science Experiments

Image Source/Tutorial: Education Possible

Learning acids, bases, and their nature can be difficult, but learning them in a practical way makes the learning process more efficient! This science experiment will also teach you how to use the pH scale! You will use a red cabbage indicator to test the pH value of common household things! It is an easy science experiment and will leave an impression on your kid that he/she will never forget!

Read More: Dolphin Crafts & Activities for Kids

Simple Water Purifying Methods

Image Source/Tutorial: The Homeschool Scientist

Do you want to learn how a charcoal filter works? Try this charcoal-purifying experiment to learn about the same! For this experiment, you will need a measuring cup, a teaspoon, 2 baby food jars with lids, activated charcoal, water, and red food coloring, charcoal removes molecules from the water! This is an easy and mess-free science experiment that you can try out on your own!

How To Make a Barometer

Image Source/Tutorial: Adventures With Kids

Make a barometer with us and track air pressure along with weather changes! This barometer can easily be made with supplies in your home! By this, you will be able to predict tomorrow’s weather! Collect your weather measurements each day and compare them with the actual weather to know how correctly you predicted and you will surely stun everyone with your results!

Spar Klean Science Experiment Ideas

Image Source/Tutorial: Angelicscalliwags

Get on germ alert with this amazing science experiment! You can get to know if your surroundings are cleaned or not and if they require further improvement! This is an easy science experiment and you can perform it easily at your home with already available supplies! You just have to surveillance the experiment for 4 days and you will get to know the speed and amount of germs growing in your particular surrounding!

Color And Memory Science Experiment

Image Source/Tutorial: Education.com/Colors and Memory

Explore with colors whether they affect your memory or not! Use different colored markers to write something important and see whether you remember what you have written before and of which color. If you remember some that identify which certain colors you remember and those colors will be the effective colors for your brain to easily learn and remember!

Read More: Duct Tape Projects Ideas For Kids

Stem Activities For Students Who Love Games

Image Source/Tutorial: Student Savvy

Games are loved b every kid and what’s better if you can able to teach them something while they play games? These amazing stem activities are full of science applications and the children will love to explore and play with them and unknowingly will learn science too! Educate children with smart learning activities to keep them interested and never let them forget anything!

Easy Bean Classification Science Project

Image Source/Tutorial: Our Journey Westward

Make the students learn about bean taxonomy practically! This activity includes assigning 40-50 different types of beans to every student and they have to classify them in creative characteristics, not colors! In the end, the students will be able to separate beans in different-different characteristics other than bifurcating them into colors and will learn the full taxonomy of each bean in a fun learning way!

Oxidation Experiment For grade 7

Image Source/Tutorial: Teach Beside Me

Learn the process and reason for oxidation! Do this cool science experiment to know why the metals rust and when. Also, a measure which thing rust quickly! This is a fun science experiment with the easiest supplies available to you around, all you need are the things you need to check if rusts or not, paper cups, and some water. Keep the things individually in paper cups with water and just surveillance them if they rust! That’s all!

How To Make Lip Balm

Image Source/Tutorial: Science Buddies/Lip Balm DIY

Make your own DIY lip balm at home! This science experiment will let you be a cosmetic scientist! Create a lip balm in your kitchen with just some simple supplies and test it! This lip will be cheap unlike the costly lip balm available in the market! You can also customize your lip balm in different colors and fragrances and even gift it to your friend! They will love it! Wake up your inner scientist and make it with us!

I hope you like our list of Science Fair Projects & Experiments 7th Grade and will surely try to make them. If you like our ideas and want to read more crafts ideas, Keep visiting our website for the latest DIY ideas and other creative stuff for kids, parents, and teachers. Please let us know in the comment section which Science Fair Project you like the most.

Thank you and have a nice day!

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7th Grade Science Projects

50 Best 7th Grade Science Fair Projects and Classroom Activities

Engage every student with these 7th grade science fair projects, whether they’re interested in biology, chemistry, physics, environmental science, or any other discipline. Plus, find interesting classroom demos, experiments, and hands-on activities to spice up your lesson plans!

To make it easier to find classroom activities or science fair ideas for 7th grade, we’ve rated all the projects by difficulty and the materials needed:

Difficulty:

• Easy: Low or no-prep experiments you can do pretty much anytime
• Medium: These take a little more setup or a longer time to complete
• Advanced: Experiments like these take a fairly big commitment of time or effort
• Basic: Simple items you probably already have around the house
• Medium: Items that you might not already have but are easy to get your hands on
• Advanced: These require specialized or more expensive supplies to complete

Biology and Ecology Science Fair Ideas for 7th Grade

Want to learn more about animals or human behavior, the environment around you, or other life science topics? Try these 7th grade science fair projects.

Learn whether color affects memory

Difficulty: Easy / Materials: Medium

Can certain colors improve your memory? This experiment explores that idea using different text, background colors, and blue light settings on devices.

Learn more: Colors and Memory at Education.com

Explore how sugary drinks affect teeth

The calcium content of eggshells makes them a great stand-in for teeth. In this experiment, students use eggs to determine how soda and juice stain the teeth and wear down the enamel. (Bonus: Have students try different toothpaste and toothbrush combinations to see how effective they are.)

Learn more: Eggshell Experiment at Feels Like Home

Extract DNA from an onion

Difficulty: Medium / Materials: Medium

Learn how to extract DNA from an onion (most of what you need you can find at home, and you can get 95% ethanol at Amazon ). Then, turn it into an experiment by applying the theory to other fruits or vegetables to see if you can get similar results.

Stretch your mind with a flexibility experiment

Difficulty: Medium / Materials: Basic

Find out how important stretching really is by comparing the flexibility of willing test subjects before and after stretch exercises. This is a great experiment for fitness fans.

Learn more: Flexibility Experiment at We Have Kids

Construct a DIY grow box

Design a grow box using a cardboard box, foil, and a plug-in light socket . Then, use it for all kinds of plant-based science fair ideas for 7th grade students.

Learn more: DIY Grow Box at Uplifting Mayhem

Collect and control biofilm

Bacteria that accumulate on objects in the water form a substance called biofilm. In this 7th grade science fair project, students build an apparatus to collect biofilm and then experiment with ways to reduce the amount of biofilm that accumulates over time.

Learn more: Biofilm Experiment at The Homeschool Scientist

See if caffeine helps you type faster

People seek out a jolt of caffeine when they’re feeling sluggish, but does it really help them perform better? This 7th grade science fair project tasks students with answering that question using the scientific method.

Find out if all plants are phototropic

You probably already know that many plants grow toward the light. But do all of them respond in the same way? Test several types of plants to find out.

Devise a water filtration system

Plenty of homes use water filtration systems these days, but how do they really work? This chemistry experiment explores how charcoal filters impurities from drinking water.

Learn more: Water Filtration at The Homeschool Scientist

Determine whether text abbreviations are a new language

Kids are fluent in text-speak, but does it really count as a whole new language? In this 7th grade science fair project, students research language and the history of texting, then compile a texting glossary and consider texting’s practical applications.

Learn more: Text Language at Education.com

Chemistry Science Fair Ideas for 7th Grade

If you’re fascinated by test tubes, beakers, and Bunsen burners, check out these interesting 7th grade science fair projects and ideas.

Design your own slime

Chances are good your students already love making and playing with slime. Turn the fun into an experiment by changing the ingredients to create slime with a variety of properties, from magnetic to glow-in-the-dark!

Copper-plate some coins

Students need just a few simple supplies to perform electroplating, but the results are always impressive. (Get copper strips  and 9V battery snap connectors with alligator clips on Amazon.) Turn this into a 7th grade science fair project by changing up the variables (does temperature matter?) or items being electroplated.

Learn more: Electroplating at KiwiCo

Swab and test for germs

Germ experiments are one of the most popular science fair ideas for 7th grade students. Swab household items, school supplies, and more to discover what’s living on the items around you.

Learn more: Germ Experiment at Angelic Scalliwags

Spherify your favorite beverage

Spherification is a hot trend in top restaurants, but 7th grade science students can easily replicate it at home with a spherification kit . This is a cool chemistry experiment, and tasty too!

Test calorie counts in packaged foods

Ever wonder how scientists determine how many calories are in your food? Try this experiment to find out!

Explore mummification

First, learn how to mummify a hot dog using baking soda as a desiccant. Then, experiment with other desiccants or items to turn this into a bona fide experiment.

Play around with oxidation

Can you find a way to slow or prevent oxidation (rusting)? This is one of those 7th grade science fair ideas that’s simple in concept but has lots of practical applications.

Learn more: Oxidation Experiment at Teach Beside Me

Blow hot or cold bubbles

Blowing bubbles may sound like too much fun for a science project, but when conditions like temperature are altered, the experimental part kicks in. What conditions do you need to blow a bubble that freezes?

Learn more:  Bubble Life & Temperature at ThoughtCo.

Whip up some eggshell chalk

Use the calcium in eggshells to make your own sidewalk chalk. Then, tinker with the recipe to see if you can make the chalk last longer, resist water, or other variables.

Learn more: DIY Chalk at Kidspot

See the effect of acid rain on plants

Difficulty: Easy / Materials: Basic

This simple project tests whether acid rain has any effect on plant life, using vinegar in place of fossil fuels. Experiment with different acid concentrations and pH levels for a more advanced version.

Learn more: Acid Rain Experiment at STEAM Powered Family

Physics and Engineering Science Fair Ideas for 7th Grade

Explore the laws of motion, the science of energy, or STEM challenge engineering ideas through 7th grade science fair projects like these.

Drive a balloon-powered car

Engineer a balloon-powered car using basic materials from around the house (even the wheels are bottle caps!). Experiment to see how far or fast you can make the car go.

Learn more: Balloon Car at Prolab

Construct a geodesic dome

Budding engineers will love designing, building, and testing the strength of the fascinating geodesic dome. This experiment requires nothing more than newspaper and masking tape!

Design a solar oven

Students experiment with the best way to build a solar oven, exploring thermal energy, reflection, convection, and other physics concepts. They can serve up their experiment results along with their final reports!

Learn more: Solar Oven at Children’s Science Center

Lend a helping hand

This is a great individual or group 7th grade science project, as it encourages students to use and hone their design and engineering skills to make a working model of a hand. If you’ve got robotics skills, take this project to a more advanced level.

Build a Da Vinci bridge

There are plenty of bridge-building experiments out there, but this one is unique. It’s inspired by Leonardo da Vinci’s 500-year-old self-supporting wooden bridge. Build a model and test the amount of weight it can hold, or craft a full-size version to put Da Vinci’s plan into action.

Construct a water clock

You’ll blow your 7th grade science students’ minds when you tell them they’re going to build a clock using engineering that’s been around for thousands of years. The supplies are simple, but the results are pretty neat!

Learn more: Water Clock at STEAM Powered Family

Generate electricity

In this science fair project, kids build a generator from scratch. Turn it into an experiment by varying the materials to see if you can increase the amount of energy it produces.

Test the elasticity of balloons

Explore whether heat and cold have an effect on elasticity using balloons. Try this with other materials too to expand the project. ( Find more balloon science here! )

Freeze water in an instant

Explore the concept of nucleation (the process of chain reactions) by turning water into ice in seconds! Make this a 7th grade science fair project by trying the same process with other liquids.

Auto-feed your pet

Difficulty: Advanced / Materials: Advanced

Can you build a device that feeds your pets automatically? Even better, can you make it inexpensive and easy for others to build too? This project has real practical applications.

7th Grade Science Classroom Demos, Experiments, and Hands-On Activities

Use these classroom activities to teach human biology, mechanical engineering, and more physics and chemistry concepts in engaging and exciting ways.

Use Oreos to teach mitosis

A 7th grade science activity that doubles as a sweet treat? Your students are going to love this activity using Oreo cookies and colorful sprinkles to make cellular mitosis models.

Learn more: Oreo Mitosis at Ballin With Balling

Twist pipe cleaners to explore meiosis

Meiosis is similar to mitosis, but it’s specific to the production of gametes. These hands-on models use basic materials like pipe cleaners and beads to make the process easier to visualize.

Learn more: Meiosis Models at Science Prof Online

Teach about “Homer-o-stasis”

Difficulty: Medium / Materials: Advanced

This is such a fun way to teach kids about the concept of homeostasis! Get all the instructions you need at the link.

Learn more: Homer-o-stasis at The Trendy Science Teacher

Sort jelly beans to learn genetics

If you’re learning about how genetic traits are passed along from parent to child, try this jelly-bean demo. When you’re finished, you can enjoy a sweet treat!

Learn more: Jelly Bean Genetics at The Owl Teacher

Design a pinball machine

Give your class basic supplies like rubber bands, plastic cups, and cardboard boxes. Then challenge them to create their very own pinball machines!

Learn more: Pinball STEM Challenge at Student Savvy

Conduct a carbon cycle lab activity

If you’ve got access to some basic chemicals, conduct this lab that helps students see the carbon cycle in action using their own breath.

Learn more: Science Lessons That Rock

Make a tea bag float on air

This easy experiment is a cool way to show kids how heat affects air molecules, making hot air rise. They’ll need some supervision with the fire, so try this out on the playground for extra safety.

Learn more: Floating Tea Bags at Coffee Cups and Crayons

Learn how salt affects density

Explore the salinity of various bodies of water, then re-create their waters to see if you can make an egg float or sink. Experiment with other objects too.

Learn more: Saltwater Density at Uplifting Mayhem

Watch the greenhouse effect in action

Climate change can be a contentious topic, so start by teaching kids about the greenhouse effect, which is easy to see and understand. Then, urge them to explore data collected by other scientists so they can learn to make informed decisions about topics like global warming.

Learn more: Greenhouse Effect at Teaching Science With Lynda

Blow bubbles to explore cell membranes

Kids are never too old to enjoy bubbles, so use them to learn more about cell membranes in this fun 7th grade science activity.

Learn more: Cell Membrane Bubbles at The Trendy Science Teacher

Marvel at a density rainbow

We learn early on that oil floats on water, but where do other liquids fit in? Students find out when they conduct this colorful density experiment that has them layer different substances, making a rainbow.

Ride the wave (machine)

Learning about wave action? Build this surprisingly easy wave machine for hands-on exploration.

Learn more: Wave Machine at Engaging Science Labs

Create a taxonomy system

Students can step into Linnaeus’ shoes by creating their own system of taxonomy using a handful of different dried beans. This is a fun 7th grade science project to do in groups, so students can see the differences between each group’s system.

Learn more: Taxonomy Project at Our Journey Westward

Bake an edible cell model

Sure, students could build a cell model out of clay, but cake and candy are so much more delicious! Check out the link below to see how one teacher does it.

Learn more: Edible Cell Model at Weird Unsocialized Homeschooling

Swing a glass of water

This classic science experiment teaches kids about centripetal force. Be forewarned: This could potentially make a bit of a mess, so consider taking this one outside.

Simulate natural selection with a lab activity

Travel to the Galápagos Islands and follow in Darwin’s footsteps as students explore finch beak adaptations in this clever natural selection lab.

Learn more: Natural Selection Lab at Teach To Serve

Participate in Project FeederWatch

Citizen science projects bring science to life for kids! One of our favorites is Project FeederWatch, where kids put out bird feeders and then count and report on their visitors. This is a great way to build a love of birding for life.

Learn more: Classroom Resources at Project FeederWatch

Experiment with basic substances to learn about chemical change

If you’re introducing lab work and chemistry basics to 7th graders, this easy lab is a great way to do it. They’ll learn safety procedures and get to feel like “real” scientists as they pour, mix, swirl, and more.

Learn more: Chemical Change Lab at Super Sass and Science Class

Assemble an edible DNA model

DNA models are always more fun when you can snack on them afterwards. Want to make this a healthier activity? Use fruits and veggies to make models instead.

Learn more: Edible DNA Model at Hess UnAcademy

Craft a food web marble maze

Combine a STEM challenge with learning about food webs in this clever project. Kids will love the hands-on aspect, and it will really help the learning stick.

Learn more: Food Web Marble Maze at Teach Savvy

Keep the STEM learning going with these 15 Items All Middle School Math Classrooms Need .

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Babble Dabble Do

80 of the Best Physics Projects for Clever Kids

February 21, 2020 by Ana Dziengel Leave a Comment

Physics projects are some of the most memorable science projects your kids will ever try. There, I said it even if you don’t believe it!

You see, physics is the branch of science that studies flying, launching, moving, and floating, as well as magnets, motors and electrical circuits, heat, light, and sound. Physics is fun! After you look over some of the projects in this collection I hope you’ll agree.

Now before we begin I want to address a common notion a lot of folks have about this branch of science: Physics is really hard! I completely understand this thought.

In fact the only class I ever almost failed in my entire academic career was physics. And I know why. Physics was presented to me as formulas about force, equilibrium, and momentum with not one single demonstration. Then I walked into a structural engineering class where we discussed the forces at work in designing buildings and my teacher told us he didn’t want us to open a book all quarter. Instead he told us to build models. He wanted us to experiment with how forces really interact in a structure by testing them in hands-on experiments. It was a profound experience for me and suddenly all the book learning “clicked.”

My goal with this collection of projects is to make physics more accessible and inviting to parents, teachers, and kids alike! But before we dive into the physics projects let’s get a bird’s eye view of what physics is all about!

What is the study of physics?

Physics is the branch of science that studies matter, how it moves and how it interacts. It is a HUGE topic and there is a lot of overlap with chemistry and biology. It’s really easy to hear the word physics and have your eyes glaze over, but in simple words physics is the study of how things move and interact with each other.

How do you explain physics to a child?

The best way to explain physics to kids is to skip an explanation and do a demonstration . Since physics encompasses the study of motion, light, electricity, magnetism, and aerodynamics, instead of trying to explain these concepts demonstrate them! I am a big believer in hands-on projects that give kids a chance to experience and experiment with a scientific concept rather than just hear or read about it. We all know an amazing project is memorable while a wordy explanation is forgettable. Kids are great visual learners so give them the chance to get excited about physics through projects!

What are main branches of Physics?

While I was assembling this post I realized scientists define the branches of physics in many different ways. The following is a list of the most commonly cited branches of physics compiled from both online and offline resources:

• Mechanics This includes force, motion, fluid and aerodynamics, and is the branch most people think of when they hear the word physics.
• Electromagnetism Electricity is physics!

Thermodynamics

• Sound and Waves
• Quantum Mechanics This is for the very serious! It’s the branch that studies atomic particles.

80+ Physics Projects for Kids

How to use this guide.

The physics projects for kids featured here are sorted by branches of physics and subcategories as follows (click on the topic to skip to that section) :

• Mechanics and Motion: Work & Energy, Newton’s Law’s of Motion, Radial Forces, Gravity, and Balance
• Electromagnetism & Electricity: Magnetism, Electricity

Optics & Sound

• Heat, Liquids, and Air: Thermodynamics, Hydrodynamics, & Aerodynamics

Some topics and categories were really easy to find great projects for (work and energy) some were more challenging (thermodynamics) and at least one impossible (Quantum mechanics, but that’s okay!). We tried to assemble as many as we could on this list!

Please note that many of these projects could fit in two or more categories as they demonstrate various principles and forces. I only classified them once on this list.

Mechanics and Motion

When most people think of physics they think about mechanics and motion. Mechanics refers to the motion of objects and motion is the position change of an object over time. Everything around us is constantly in motion. Even when we consider ourselves to be sitting still, the earth is rotating on its axis and moving around the sun.

Scientists have studied motion over the centuries and determined there are laws that can explain the motion of objects. These laws revolve around the idea of forces .

A force is something that pushes or pulls on an object to make it move. A force can make an object speed up (like kicking a ball) or or slow down (like friction) or hold an object in place (like gravity). Momentum is the force an object has based on its weight and motion. For a deeper look into forces go here .

In this section we’ll cover projects that focus on motion including 3 of the most famous laws of motion as outlined by Sir Isaac Newton.

Work and Energy Projects

Energy is defined as the ability to do work. Work refers to the amount of energy needed to move something over a distance using a force. The Law of Conservation of Energy states that energy is never created or destroyed it is simply changed from one state to another.

Potential Energy vs. Kinetic Energy

Two types of energy frequently disucssed in phyiscs are kinetic energy and potential energy. Kinetic energy is energy in motion. Potential energy is energy that is stored. An example of potential enrgy is a rubber band twisted up and held in place. Once the rubber band is released it unwinds quickly as kinetic energy.

Here are some projects that demonstrate work and energy:

Physics Project Idea: Rollback Can

Steam activity: stixplosions, how to build a catapult, transfer of energy science experiment, catapult stem project – diy catapult for kids, how to make a windmill model with a printable pattern, simple machines for kids: lego pulleys stem building challenge, power up your planes with a paper airplane launcher, featured work & energy videos:, newton's laws of motion.

Sir Isaac Newton was a mathematician and scientist who studied motion in the 1600's. He is credited with discovering the force of gravity as well as developing three laws of motion to describe how objects move. We'll look at each law of motion and some projects that highlight them below.

Newton's First Law of Motion is called the Law of Interia and states: An object at rest tends to stay as rest and an object in motion tends to stay in motion unless acted upon by an external force.

Newton's Second Law of Motio n states that the acceleration of an object depends on the force applied to the object and the object's mass. The relationship can be described with the following formula: F=ma

Force= Mass x Acceleration

Newton's Third Law of Motion states: For every action there is an equal and opposite reaction.

Here are some projects that focus on the laws of motion:

How To Make A Simple Newton's Cradle

Easy inertia science experiments with pennies, inertia zoom ball: super fun s.t.e.a.m. project, make a balloon pinwheel science demonstration, physics activities that explore newton's laws of motion, radial forces.

Kids love things that spin! There are several types of forces and movement that act upon objects as they spin:

Angular Momentum The momentum of an object rotating around a point.

Centripetal Force A force that pulls an object towards the center point, causing it to move in a circular path. The force is always orthogonal to the fixed center.

Centrifugal Force A force that pushes away from the center as an object is spinning. It's not a REAL force but an apparent force.

Friction is a force that slows down objects sliding against each other. It's the reason that spinning tops eventually slow down. If there was no friction on between the point on which a top spins and the surface on which it is spinning, it would spin forever!

Action Art: Spin Art Using a Bike

Diy spin art: art spinners from steam play & learn, simple paper toys: paper tops, homemade toy idea: diy skip-it, diy toys: spinning tops (+ magical disappearing colors), diy toy idea: spin-finite tops, gorgeous spin art hearts painting activity for kids, easy fidget spinner diy (free template) - science fair project idea, halloween science for kids: pumpkin spinning tops, stem toy: penny spinners, featured radial forces videos:.

Gravity is a force that attracts two bodies together. It's also the natural force that pulls everything towards the earth. The greater the mass of an object the more garvitational pull it has.

Scientists measure the acceration of gravity at the Earth's surface at 32 feet per second squared! That means the longer an object is free falling the more it's speed increases (not accounting for air resistance).

Here are some phyics projects for kids that explore the force of gravity and speed:

Recycled DIY Marble Run

Playground sized diy marble run, science & art for kids: salt pendulum.

Substitute paint for the sand to make a painting pendulum!

Drippy Gravity Painting | TinkerLab

Gravity beads experiment, the lincoln high dive, egg drop project with printable recording sheets, preschool science: weight, featured gravity videos:.

In phyiscs we use the word balance to describe a situation in which two forces are equal in magnitude and extered in opposite directions.

See saws and scales are two easy wasy to illustrate the concept of balance to kids. Here are some additonal project ideas:

How to Make a Balance Toy: Balance Hearts STEAM Activity

Diy balance toy & game, awesome earth day activity: make an earth balancer, how to make balance scales for toddlers and preschoolers, easy kid's craft: straw mobile, engineering for kids: twirling twig mobile, featured balance project videos, electromagnetism & electricity.

Did you know that electricity and magnetism are physics topics? Both of these “invisible” forces are some of kids’ favorites to explore through hands-on projects!

Magnetism describes a force that attracts or repels objects that are made of magnetic material.

A magnet is a type of material that attracts iron and produces it's own magnetic field. Magnets have a north and a south pole. If you hold two magnets close to each other and place like poles together the magnets will repel each other. If you place the opposite poles together they will quickly attract each other.

Science and Art for Kids: Magnetic Sculptures

The creepiest slime ever: how to make magnetic slime, 4 easy magnet experiments that will amaze your kids, science for kids: bouncing magnets, steam camp: how to make a magnetic field sensory bottle, how to make a compass - magnetic science experiment for kids, five minute craft: magnet painting, make an aladdin magic flying carpet, traveling magnets, easy science experiments for kids: gravity activity with paperclips, featured magnetism videos, electricity.

Electrical force is a force that causes electically charged bodies to either repel or attract. It's the force that carries electrical current through a wire. There are two types of electrical charges: positive and negative.

Similar to magentism like charges REPEL each other and opposite charges ATTRACT each other.

Here are some fun ways to explore elctriclty with kids.

How to Make Electric Play Dough with Kids

Steam project: tiny dancers (a homopolar motor), simple electronics: how to make a magic wand, how to make dance bots an electronics project for kids, how to make salty circuits: a simple circuit project for kids, how to make a lemon battery and a lime light, how to make a lightning bug paper circuit card, make an electromagnet, science for kids: diy magnetic led lights, static electricity balloon and salt and pepper experiment, steam camp: how to make a modern art steady hand game, origami firefly paper circuits, featured electricity videos.

What we see and hear is determined by physics! This includes the behavior of light waves and sounds waves, those that we can perceive and those we cannot.

Light is a type of energy made up of photons. Our eyes can perceive some of it and some forms we cannot perceive at all. Light travels in both wave form and particle form.

Photons are particles which can transmit light.

Optics is the study of light's behavior as well as tools we use to study and understand it, including how our eyes perceive it.

For a further study of light head over here .

Magic Mirrors: How To Make Reflection Art

Optical illusion toy: decotropes, how to make a teleidoscope (a type of diy kaleidoscope), how to make a microscope with water, magic happens when you pour water into a jar, steam project ideas - zoetrope and benham disk, rainbow science: creating light patterns with a cd, light box - a great tool for exploring the museum, spiral illusion, featured optics videos.

Sound is a vibration that travels in waves and can be detected by the ear. Sound can be transmitted through air, water, and solids.

Here are some projects that make use of sound and vibrations:

Simple Engineering Project: DIY Voicepipe

Explore the science of sound with a diy spinner, how to do the dancing oobleck experiment, sound sandwich, water-bottle membranophone, vibrating snake, how to make a rainstick instrument, rainbow water xylophone - mama.papa.bubba., featured sound videos, heat, liquids, and air.

Physics also covers the study of heat and fluid dynamics which includes aerodynamics (the study of movement in air and gases) and hydrodynamics (the study of movement in liquids) .

Thermodynamics is the branch of physics that studies heat and heat transfer. When two obejcts of different temperatures come in contact, energy will transfer between them until they reach the same temperature and are in a state of equilibrium. Heat always transfers from the higher temperature to a lower temperature. You can read more about heat here.

Heat Sensitive Color Changing Slime

Kids science: flying tea bag hot air balloon, magic jumping coin trick, convection detection, inverted bottles, convection currents, featured thermodynamics videos, hydrodynamics.

Hydrodynamics is the study of how fluids move and behave and the forces they exert. And let's be honest, kids love playing with water so use it an an entree to science!

Magic Potions Density Tower

Make a freestanding diy water wall, science for kids: scupley ships, stem project- build a hydraulic elevator, buoyancy for kids: will it sink or float, science experiments for kids: siphon water coaster, anti-gravity water - sick science, simple machines science lesson: lift water with an archimedes' screw, simple rain gauge, density science for kids : create fireworks in water & oil, featured hydrodynamics videos, aerodynamics.

After playing with water I'd say thay making things fly ranks very high on kids' must try list! Aerodynamics focuses on air movement and the forces at work as objects move through the air. It's the physics branch that let's kids explore building planes, helicopters, and rockets!

How To Make A Paper Helicopter

Diy toy: zappy zoomers, awesome science experiments with hot wheels cars, whirly twirly flying birds, stem for kids: straw rockets (with free rocket template), make an indoor paper boomerang with the kids, straws circle paper planes - s.t.e.m. for kids, how to make awesome paper airplanes 4 designs, more physics for kids resources.

The following websites are terrific resources for more information on the wonderful world of physics! These all offer in depth explanations about the phenomena we touched on above and some of them also offer additional physics projects to try.

• NASA and Newton’s Laws
• Exploratorium
• Physics 4 Kids
• Science 4 Fun

More Science on Babble Dabble Do

There’s lots more science on Babble Dabble Do! Here are some additional projects collections for you to check out:

50+ Chemistry Projects for Kids

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Science Projects for Class 7

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Science projects are an excellent way for seventh graders to dive into the world of scientific inquiry. Science Projects for Class 7 range from simple home experiments to more elaborate science fair investigations, helping students develop critical thinking and problem-solving skills. Whether exploring physics, chemistry, biology, or environmental science, these projects allow students to apply textbook theories in practical scenarios, enhancing their learning and fostering a love for science. Engaging in Science Projects Ideas for Class 7 not only meets educational requirements but also sparks a lifelong interest in science.

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10 Easy Science Projects for Class 7

Engaging in science projects is a great way for class 7 students to apply classroom concepts in real-world situations. Here are 10 easy Science Project Ideas for class 7 that are both educational and fun:

1. Pinhole Camera Project

The Pinhole Camera Project introduces the basics of photography through a creative approach. This project involves constructing a camera that lacks a lens but utilizes a small pinhole. Through this, participants can grasp the fundamental principles of light travel and image formation, offering a hands-on experience in understanding the science of capturing light and images.

Materials Needed:

• A small cardboard box (like a shoebox)
• Black paint or black construction paper
• Aluminum foil
• Pin or needle
• Photographic paper or regular paper

Instructions:

• Prepare the Box : Paint the inside of the cardboard box black or line it with black construction paper to prevent light reflections inside the box.
• Make the Pinhole : Cut a small square (about 1 inch by 1 inch) in the center of one side of the box. Cover this square with a piece of aluminum foil and secure it with tape. Use a pin or needle to poke a tiny hole in the center of the foil.
• Insert Photographic Paper : If using photographic paper, place it on the inside of the box opposite the pinhole. Ensure the box is light-tight except for the pinhole. If using regular paper, you will need to trace the image projected on it, as it won’t capture a permanent image.
• Seal the Box : Make sure all openings are sealed with tape to ensure no light leaks except through the pinhole.
• Take a Picture : Point the pinhole towards a well-lit subject. Depending on the lighting, you may need to keep the pinhole facing the subject for several minutes to capture a clear image.
• Develop the Image : If using photographic paper, develop the image in a darkroom according to the type of paper used. If using regular paper, simply trace or sketch the image projected inside the box.

2. Vacuum cleaner Project

In the Vacuum Cleaner Project, participants delve into the realm of cleaning technology. This project entails building a miniature vacuum cleaner to comprehend how suction and airflow collaborate to eliminate dirt and debris. It not only provides insight into the mechanics of a vacuum cleaner but also imparts practical knowledge on cleanliness maintenance.

• A small electric fan or motor with a fan blade
• A plastic bottle (like a soda bottle)
• Battery or power source
• Switch (optional)
• Tape or glue
• Scissors or a knife
• A piece of cloth or small filter
• Prepare the Bottle : Cut the bottom off the plastic bottle.
• Attach the Fan : Insert the electric fan into the bottle neck. It should be a tight fit; use tape or glue if necessary to secure it.
• Secure the Power Source : Connect the battery to the fan. Include a switch between the battery and the fan for easy control, if available.
• Add a Filter : Attach a piece of cloth or a small filter to the open bottom of the bottle to catch dust and prevent it from entering the fan.
• Test Your Vacuum Cleaner : Turn on the fan, and test the vacuum cleaner by holding the open end near small lightweight debris like crumbs or paper bits.

3. What Makes Ice Melt Fastest

The What Makes Ice Melt Fastest project presents a captivating experiment exploring the factors affecting the melting rate of ice. By conducting tests with various substances like salt, sugar, and sand on ice cubes, this project aids in understanding the scientific principles governing melting points and the influence of different materials on ice.

• Several identical ice cubes
• Different substances to test (e.g., salt, sugar, sand, baking soda)
• A stopwatch or timer
• Bowls or containers
• Thermometer (optional)
• Prepare the Setup : Place each ice cube in a separate bowl or container.
• Apply the Substances : Sprinkle an equal amount of each different substance on separate ice cubes. Keep one ice cube untreated as your control.
• Start the Timer : Record the time it takes for each ice cube to completely melt.
• Observe and Record : Note any differences in how quickly each ice cube melts. Use a thermometer to measure the temperature of the surroundings if you wish to record that as well.
• Analyze Results : Compare the melting times to see which substance made the ice melt fastest. Discuss why some substances might have worked better than others based on their chemical properties and how they interact with ice and heat.

4. Electricity Generator

The Electricity Generator Project offers an engaging exploration of electricity generation. By constructing a simple generator, this project demonstrates the conversion of mechanical energy into electrical energy, providing a hands-on experience in comprehending the basic principles of electrical generation.

• Small DC motor
• Gear or small hand crank
• Assemble the Generator : Attach the gear or crank to the shaft of the DC motor. This will be used to manually turn the motor.
• Connect the Motor to the LED : Use wires to connect the terminals of the motor to the leads of the LED. Ensure that the connections are secure.
• Test the Generator : Turn the crank or gear by hand to spin the motor’s shaft. As you turn the motor, it generates electricity that should light up the LED.
• Optimize : Experiment with different speeds of turning and observe the brightness of the LED. Discuss how the speed of rotation affects the electricity generated.

5. Water Filter Project

Focused on the vital task of water purification, the Water Filter Project involves constructing a water filter to illustrate the process of removing impurities and contaminants from water. It serves as an educational and practical experiment, emphasizing the significance of clean water.

• Plastic bottle or a large funnel
• Coffee filters or cheesecloth
• Activated charcoal
• Clean container to catch water
• Prepare the Filter : Cut the bottom off the plastic bottle or use a funnel placed over a container.
• Layer the Filtering Materials : Place the coffee filter or cheesecloth at the bottom to prevent the materials from falling through. Layer the gravel, then sand, and finally a layer of activated charcoal. Add another layer of sand on top if possible.
• Pour Water : Slowly pour dirty or cloudy water into the top of the filter and let it drip through into the container below.
• Observe : Watch as the water passes through the layers and comes out clearer at the bottom. Discuss the role of each layer in purifying the water.

6. Invisible Ink Project

The Invisible Ink Project is a fascinating exploration into the world of secret messaging. This project involves creating and using invisible ink to write messages that are revealed only under specific conditions. It’s a creative and engaging way to learn about chemical reactions and the science of hidden messages.

• Lemon juice or vinegar
• Cotton swabs or paintbrushes
• White paper
• A heat source (like a light bulb or hair dryer)
• Prepare the Ink : Squeeze lemon juice or vinegar into a small container. You can dilute it with a little water if you prefer a less concentrated solution.
• Write Your Message : Dip a cotton swab or a small paintbrush into the lemon juice or vinegar and use it to write a message on the white paper. The writing may be slightly visible when wet but should become invisible as it dries.
• Let It Dry : Allow the paper to dry completely. The message will disappear once the liquid evaporates.
• Reveal the Message : To read the invisible message, carefully hold the paper near a heat source. The heat will cause the dried lemon juice or vinegar to oxidize and change color, making it visible. A light bulb or hair dryer works well for this, but make sure to maintain a safe distance to avoid scorching the paper.
• Discuss the Science : Explain that the acidic lemon juice or vinegar weakens the paper fibers slightly. When heated, these areas of the paper burn or brown more quickly than the rest of the paper, revealing the message.

7. Homemade Barometer Project

The Homemade Barometer Project explores the science behind measuring atmospheric pressure. By constructing a simple barometer using everyday materials, this project demonstrates how changes in air pressure impact the liquid level in a tube, offering a fun and educational approach to learning about weather forecasting.

• Prepare the Jar : Cut the balloon open and stretch it over the mouth of the jar, ensuring it’s tightly sealed.
• Set the Indicator : Tape a straw to the center of the stretched balloon. Make sure it’s balanced and points outward horizontally.
• Create a Scale : Place the index card behind the straw to act as a scale. Use a marker to create a scale or record initial position.
• Monitor Changes : As air pressure changes, the balloon will either expand or contract, causing the straw to move up or down. Record these changes over time and correlate them with weather conditions.
• Discuss Observations : Analyze how the barometer responds to different weather patterns and why changes in air pressure affect the balloon.

8. Potato Battery Project

The Potato Battery Project is an intriguing experiment showcasing how to generate electricity using a potato. By creating a simple battery with a potato, zinc, and copper electrodes, this project illustrates the basic principles of chemical reactions and electrical energy generation.

• 2-3 potatoes
• Copper coins or strips
• Zinc nails or galvanized nails
• Wires with alligator clips
• Small LED light or digital clock
• Prepare the Potatoes : Cut each potato in half to increase the surface area.
• Insert Electrodes : Insert a copper coin or strip into one cut side of each potato half, and a zinc nail into the other side. Ensure they don’t touch each other.
• Connect the Circuit : Use wires with alligator clips to connect the copper of one potato to the zinc of another potato. Continue this pattern for all potato halves.
• Attach the Device : Connect the free copper and zinc ends to the small LED light or digital clock. The copper should be connected to the positive terminal, and the zinc to the negative terminal.
• Observe : Watch as the chemical reaction between the zinc, the acid in the potato, and the copper generates a small electrical current, powering the LED light or clock.

9. Cloud Formation

The Cloud Formation project is an informative study of how clouds are formed in the atmosphere. By understanding the processes of evaporation, condensation, and precipitation, this project explains the science behind cloud formation and weather patterns.

• A clear plastic bottle with a cap
• Matches (adult supervision required)
• Prepare the Bottle : Fill the plastic bottle one-third full with warm water and cap it. Let it sit for about a minute.
• Create Smoke : Light a match, let it burn for a few seconds, and then drop it into the bottle (adult supervision required). Quickly cap the bottle.
• Form the Cloud : Squeeze the bottle hard for about 5 seconds and then release it. Observe the formation of a small cloud inside the bottle when you release the pressure.
• Explain the Science : Discuss how the smoke particles acted as condensation nuclei, allowing water vapor to condense and form a cloud when the pressure was quickly decreased.

10. Learn How Salt Affects Density

The Learn How Salt Affects Density project explores the concept of density through a simple experiment involving saltwater. By measuring the density of water with varying amounts of salt, this project illustrates how the concentration of salt affects the density of the solution.

• Two glasses of water
• Two raw eggs
• Spoon or stirrer
• Prepare the Solutions : Fill one glass with plain tap water and the other with tap water and a generous amount of salt. Stir the salt water until the salt completely dissolves.
• Conduct the Experiment : Carefully place a raw egg into each glass.
• Observe and Compare : Notice that the egg sinks in the plain water but floats in the salt water.
• Discuss the Results : Explain how the addition of salt increased the water’s density, making it dense enough to support the egg, which demonstrates buoyancy principles.

NCERT Solutions for Class 7 Science Other Chapters

• Chapter 2 Nutrition in Animals
• Chapter 3 Fibre to Fabric
• Chapter 4 Heat
• Chapter 5 Acids, Bases, and Salts
• Chapter 6 Physical and Chemical Changes
• Chapter 7 Weather, Climate, and Adaptations of Animals to Climate
• Chapter 8 Winds, Storms, and Cyclones
• Chapter 9 Soil
• Chapter 10 Respiration in Organisms
• Chapter 11 Transportation in Animals and Plants
• Chapter 12 Reproduction in Plants
• Chapter 13 Motion and Time
• Chapter 14 Electric Current and Its Effects
• Chapter 15 Light
• Chapter 16 Water: A Precious Resource
• Chapter 17 Forests: Our Lifeline
• Chapter 18 Wastewater Story

FAQs on Science Projects for Class 7

What is the best science project for class 7.

The best science project for Class 7 depends on the student's interests but a popular choice is creating a simple electric circuit. It's engaging and educational, illustrating basic physics concepts.

What are good 7th grade science fair projects?

Good 7th grade science fair projects include building a homemade barometer to study weather changes, or a potato battery to explore electricity generation. These projects are both fun and insightful.

Which is the best project for science?

The best project for science combines learning with hands-on experience. For Class 7, constructing a model of the solar system or experimenting with plant growth under different conditions can be very enlightening.

What is experimental project work class 7?

Experimental project work for Class 7 involves hands-on projects where students form a hypothesis, conduct experiments to test it, and analyze results. Examples include testing what conditions best help a plant to grow or studying simple chemical reactions.

How can I choose a project?

Choose a project by considering what topics interest you the most and what materials you readily have available. Also, think about whether you prefer something more creative or analytical.

How do you conduct a science experiment Class 7?

To conduct a science experiment in Class 7, start by defining your hypothesis. Next, gather materials, perform the experiment while carefully recording all observations, and finally, analyze the results to draw conclusions.

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72 Easy Science Experiments Using Materials You Already Have On Hand

Because science doesn’t have to be complicated.

If there is one thing that is guaranteed to get your students excited, it’s a good science experiment! While some experiments require expensive lab equipment or dangerous chemicals, there are plenty of cool projects you can do with regular household items. We’ve rounded up a big collection of easy science experiments that anybody can try, and kids are going to love them!

Easy Chemistry Science Experiments

Easy physics science experiments, easy biology and environmental science experiments, easy engineering experiments and stem challenges.

1. Taste the Rainbow

Teach your students about diffusion while creating a beautiful and tasty rainbow! Tip: Have extra Skittles on hand so your class can eat a few!

Learn more: Skittles Diffusion

2. Crystallize sweet treats

Crystal science experiments teach kids about supersaturated solutions. This one is easy to do at home, and the results are absolutely delicious!

Learn more: Candy Crystals

3. Make a volcano erupt

This classic experiment demonstrates a chemical reaction between baking soda (sodium bicarbonate) and vinegar (acetic acid), which produces carbon dioxide gas, water, and sodium acetate.

Learn more: Best Volcano Experiments

4. Make elephant toothpaste

This fun project uses yeast and a hydrogen peroxide solution to create overflowing “elephant toothpaste.” Tip: Add an extra fun layer by having kids create toothpaste wrappers for plastic bottles.

5. Blow the biggest bubbles you can

Add a few simple ingredients to dish soap solution to create the largest bubbles you’ve ever seen! Kids learn about surface tension as they engineer these bubble-blowing wands.

Learn more: Giant Soap Bubbles

6. Demonstrate the “magic” leakproof bag

All you need is a zip-top plastic bag, sharp pencils, and water to blow your kids’ minds. Once they’re suitably impressed, teach them how the “trick” works by explaining the chemistry of polymers.

Learn more: Leakproof Bag

7. Use apple slices to learn about oxidation

Have students make predictions about what will happen to apple slices when immersed in different liquids, then put those predictions to the test. Have them record their observations.

Learn more: Apple Oxidation

8. Float a marker man

Their eyes will pop out of their heads when you “levitate” a stick figure right off the table! This experiment works due to the insolubility of dry-erase marker ink in water, combined with the lighter density of the ink.

Learn more: Floating Marker Man

9. Discover density with hot and cold water

There are a lot of easy science experiments you can do with density. This one is extremely simple, involving only hot and cold water and food coloring, but the visuals make it appealing and fun.

Learn more: Layered Water

10. Layer more liquids

This density demo is a little more complicated, but the effects are spectacular. Slowly layer liquids like honey, dish soap, water, and rubbing alcohol in a glass. Kids will be amazed when the liquids float one on top of the other like magic (except it is really science).

Learn more: Layered Liquids

11. Grow a carbon sugar snake

Easy science experiments can still have impressive results! This eye-popping chemical reaction demonstration only requires simple supplies like sugar, baking soda, and sand.

Learn more: Carbon Sugar Snake

12. Mix up some slime

Tell kids you’re going to make slime at home, and watch their eyes light up! There are a variety of ways to make slime, so try a few different recipes to find the one you like best.

13. Make homemade bouncy balls

These homemade bouncy balls are easy to make since all you need is glue, food coloring, borax powder, cornstarch, and warm water. You’ll want to store them inside a container like a plastic egg because they will flatten out over time.

Learn more: Make Your Own Bouncy Balls

14. Create eggshell chalk

Eggshells contain calcium, the same material that makes chalk. Grind them up and mix them with flour, water, and food coloring to make your very own sidewalk chalk.

Learn more: Eggshell Chalk

15. Make naked eggs

This is so cool! Use vinegar to dissolve the calcium carbonate in an eggshell to discover the membrane underneath that holds the egg together. Then, use the “naked” egg for another easy science experiment that demonstrates osmosis .

Learn more: Naked Egg Experiment

16. Turn milk into plastic

This sounds a lot more complicated than it is, but don’t be afraid to give it a try. Use simple kitchen supplies to create plastic polymers from plain old milk. Sculpt them into cool shapes when you’re done!

17. Test pH using cabbage

Teach kids about acids and bases without needing pH test strips! Simply boil some red cabbage and use the resulting water to test various substances—acids turn red and bases turn green.

Learn more: Cabbage pH

18. Clean some old coins

Use common household items to make old oxidized coins clean and shiny again in this simple chemistry experiment. Ask kids to predict (hypothesize) which will work best, then expand the learning by doing some research to explain the results.

Learn more: Cleaning Coins

19. Pull an egg into a bottle

This classic easy science experiment never fails to delight. Use the power of air pressure to suck a hard-boiled egg into a jar, no hands required.

Learn more: Egg in a Bottle

20. Blow up a balloon (without blowing)

Chances are good you probably did easy science experiments like this when you were in school. The baking soda and vinegar balloon experiment demonstrates the reactions between acids and bases when you fill a bottle with vinegar and a balloon with baking soda.

21 Assemble a DIY lava lamp

This 1970s trend is back—as an easy science experiment! This activity combines acid-base reactions with density for a totally groovy result.

22. Explore how sugary drinks affect teeth

The calcium content of eggshells makes them a great stand-in for teeth. Use eggs to explore how soda and juice can stain teeth and wear down the enamel. Expand your learning by trying different toothpaste-and-toothbrush combinations to see how effective they are.

Learn more: Sugar and Teeth Experiment

23. Mummify a hot dog

If your kids are fascinated by the Egyptians, they’ll love learning to mummify a hot dog! No need for canopic jars , just grab some baking soda and get started.

24. Extinguish flames with carbon dioxide

This is a fiery twist on acid-base experiments. Light a candle and talk about what fire needs in order to survive. Then, create an acid-base reaction and “pour” the carbon dioxide to extinguish the flame. The CO2 gas acts like a liquid, suffocating the fire.

25. Send secret messages with invisible ink

Turn your kids into secret agents! Write messages with a paintbrush dipped in lemon juice, then hold the paper over a heat source and watch the invisible become visible as oxidation goes to work.

Learn more: Invisible Ink

26. Create dancing popcorn

This is a fun version of the classic baking soda and vinegar experiment, perfect for the younger crowd. The bubbly mixture causes popcorn to dance around in the water.

27. Shoot a soda geyser sky-high

You’ve always wondered if this really works, so it’s time to find out for yourself! Kids will marvel at the chemical reaction that sends diet soda shooting high in the air when Mentos are added.

Learn more: Soda Explosion

28. Send a teabag flying

Hot air rises, and this experiment can prove it! You’ll want to supervise kids with fire, of course. For more safety, try this one outside.

Learn more: Flying Tea Bags

29. Create magic milk

This fun and easy science experiment demonstrates principles related to surface tension, molecular interactions, and fluid dynamics.

Learn more: Magic Milk Experiment

30. Watch the water rise

Learn about Charles’s Law with this simple experiment. As the candle burns, using up oxygen and heating the air in the glass, the water rises as if by magic.

Learn more: Rising Water

31. Learn about capillary action

Kids will be amazed as they watch the colored water move from glass to glass, and you’ll love the easy and inexpensive setup. Gather some water, paper towels, and food coloring to teach the scientific magic of capillary action.

Learn more: Capillary Action

32. Give a balloon a beard

Equally educational and fun, this experiment will teach kids about static electricity using everyday materials. Kids will undoubtedly get a kick out of creating beards on their balloon person!

Learn more: Static Electricity

33. Find your way with a DIY compass

Here’s an old classic that never fails to impress. Magnetize a needle, float it on the water’s surface, and it will always point north.

Learn more: DIY Compass

34. Crush a can using air pressure

Sure, it’s easy to crush a soda can with your bare hands, but what if you could do it without touching it at all? That’s the power of air pressure!

35. Tell time using the sun

While people use clocks or even phones to tell time today, there was a time when a sundial was the best means to do that. Kids will certainly get a kick out of creating their own sundials using everyday materials like cardboard and pencils.

Learn more: Make Your Own Sundial

36. Launch a balloon rocket

Grab balloons, string, straws, and tape, and launch rockets to learn about the laws of motion.

37. Make sparks with steel wool

All you need is steel wool and a 9-volt battery to perform this science demo that’s bound to make their eyes light up! Kids learn about chain reactions, chemical changes, and more.

Learn more: Steel Wool Electricity

38. Levitate a Ping-Pong ball

Kids will get a kick out of this experiment, which is really all about Bernoulli’s principle. You only need plastic bottles, bendy straws, and Ping-Pong balls to make the science magic happen.

39. Whip up a tornado in a bottle

There are plenty of versions of this classic experiment out there, but we love this one because it sparkles! Kids learn about a vortex and what it takes to create one.

Learn more: Tornado in a Bottle

40. Monitor air pressure with a DIY barometer

This simple but effective DIY science project teaches kids about air pressure and meteorology. They’ll have fun tracking and predicting the weather with their very own barometer.

Learn more: DIY Barometer

41. Peer through an ice magnifying glass

Students will certainly get a thrill out of seeing how an everyday object like a piece of ice can be used as a magnifying glass. Be sure to use purified or distilled water since tap water will have impurities in it that will cause distortion.

Learn more: Ice Magnifying Glass

42. String up some sticky ice

Can you lift an ice cube using just a piece of string? This quick experiment teaches you how. Use a little salt to melt the ice and then refreeze the ice with the string attached.

Learn more: Sticky Ice

43. “Flip” a drawing with water

Light refraction causes some really cool effects, and there are multiple easy science experiments you can do with it. This one uses refraction to “flip” a drawing; you can also try the famous “disappearing penny” trick .

Learn more: Light Refraction With Water

44. Color some flowers

We love how simple this project is to re-create since all you’ll need are some white carnations, food coloring, glasses, and water. The end result is just so beautiful!

45. Use glitter to fight germs

Everyone knows that glitter is just like germs—it gets everywhere and is so hard to get rid of! Use that to your advantage and show kids how soap fights glitter and germs.

Learn more: Glitter Germs

46. Re-create the water cycle in a bag

You can do so many easy science experiments with a simple zip-top bag. Fill one partway with water and set it on a sunny windowsill to see how the water evaporates up and eventually “rains” down.

Learn more: Water Cycle

47. Learn about plant transpiration

Your backyard is a terrific place for easy science experiments. Grab a plastic bag and rubber band to learn how plants get rid of excess water they don’t need, a process known as transpiration.

Learn more: Plant Transpiration

48. Clean up an oil spill

Before conducting this experiment, teach your students about engineers who solve environmental problems like oil spills. Then, have your students use provided materials to clean the oil spill from their oceans.

Learn more: Oil Spill

49. Construct a pair of model lungs

Kids get a better understanding of the respiratory system when they build model lungs using a plastic water bottle and some balloons. You can modify the experiment to demonstrate the effects of smoking too.

Learn more: Model Lungs

50. Experiment with limestone rocks

Kids  love to collect rocks, and there are plenty of easy science experiments you can do with them. In this one, pour vinegar over a rock to see if it bubbles. If it does, you’ve found limestone!

Learn more: Limestone Experiments

51. Turn a bottle into a rain gauge

All you need is a plastic bottle, a ruler, and a permanent marker to make your own rain gauge. Monitor your measurements and see how they stack up against meteorology reports in your area.

Learn more: DIY Rain Gauge

52. Build up towel mountains

This clever demonstration helps kids understand how some landforms are created. Use layers of towels to represent rock layers and boxes for continents. Then pu-u-u-sh and see what happens!

Learn more: Towel Mountains

53. Take a play dough core sample

Learn about the layers of the earth by building them out of Play-Doh, then take a core sample with a straw. ( Love Play-Doh? Get more learning ideas here. )

Learn more: Play Dough Core Sampling

54. Project the stars on your ceiling

Use the video lesson in the link below to learn why stars are only visible at night. Then create a DIY star projector to explore the concept hands-on.

Learn more: DIY Star Projector

55. Make it rain

Use shaving cream and food coloring to simulate clouds and rain. This is an easy science experiment little ones will beg to do over and over.

Learn more: Shaving Cream Rain

56. Blow up your fingerprint

This is such a cool (and easy!) way to look at fingerprint patterns. Inflate a balloon a bit, use some ink to put a fingerprint on it, then blow it up big to see your fingerprint in detail.

57. Snack on a DNA model

Twizzlers, gumdrops, and a few toothpicks are all you need to make this super-fun (and yummy!) DNA model.

Learn more: Edible DNA Model

58. Dissect a flower

Take a nature walk and find a flower or two. Then bring them home and take them apart to discover all the different parts of flowers.

59. Craft smartphone speakers

No Bluetooth speaker? No problem! Put together your own from paper cups and toilet paper tubes.

Learn more: Smartphone Speakers

60. Race a balloon-powered car

Kids will be amazed when they learn they can put together this awesome racer using cardboard and bottle-cap wheels. The balloon-powered “engine” is so much fun too.

Learn more: Balloon-Powered Car

61. Build a Ferris wheel

You’ve probably ridden on a Ferris wheel, but can you build one? Stock up on wood craft sticks and find out! Play around with different designs to see which one works best.

Learn more: Craft Stick Ferris Wheel

62. Design a phone stand

There are lots of ways to craft a DIY phone stand, which makes this a perfect creative-thinking STEM challenge.

63. Conduct an egg drop

Put all their engineering skills to the test with an egg drop! Challenge kids to build a container from stuff they find around the house that will protect an egg from a long fall (this is especially fun to do from upper-story windows).

Learn more: Egg Drop Challenge Ideas

64. Engineer a drinking-straw roller coaster

STEM challenges are always a hit with kids. We love this one, which only requires basic supplies like drinking straws.

Learn more: Straw Roller Coaster

65. Build a solar oven

Explore the power of the sun when you build your own solar ovens and use them to cook some yummy treats. This experiment takes a little more time and effort, but the results are always impressive. The link below has complete instructions.

Learn more: Solar Oven

66. Build a Da Vinci bridge

There are plenty of bridge-building experiments out there, but this one is unique. It’s inspired by Leonardo da Vinci’s 500-year-old self-supporting wooden bridge. Learn how to build it at the link, and expand your learning by exploring more about Da Vinci himself.

Learn more: Da Vinci Bridge

67. Step through an index card

This is one easy science experiment that never fails to astonish. With carefully placed scissor cuts on an index card, you can make a loop large enough to fit a (small) human body through! Kids will be wowed as they learn about surface area.

68. Stand on a pile of paper cups

Combine physics and engineering and challenge kids to create a paper cup structure that can support their weight. This is a cool project for aspiring architects.

Learn more: Paper Cup Stack

69. Test out parachutes

Gather a variety of materials (try tissues, handkerchiefs, plastic bags, etc.) and see which ones make the best parachutes. You can also find out how they’re affected by windy days or find out which ones work in the rain.

Learn more: Parachute Drop

70. Recycle newspapers into an engineering challenge

It’s amazing how a stack of newspapers can spark such creative engineering. Challenge kids to build a tower, support a book, or even build a chair using only newspaper and tape!

Learn more: Newspaper STEM Challenge

71. Use rubber bands to sound out acoustics

Explore the ways that sound waves are affected by what’s around them using a simple rubber band “guitar.” (Kids absolutely love playing with these!)

Learn more: Rubber Band Guitar

72. Assemble a better umbrella

Challenge students to engineer the best possible umbrella from various household supplies. Encourage them to plan, draw blueprints, and test their creations using the scientific method.

Learn more: Umbrella STEM Challenge

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Mind-Blowing Physics Experiments You Can Do at Home

Ready to explore the wonders of science from your own kitchen? Physics isn't just equations and textbooks – it's all around us, waiting to be discovered! We're going to dive into five easy, yet mind-blowing physics experiments you can try at home. These demonstrations are perfect for impressing your friends and family, or simply satisfying your own scientific curiosity.

1. The Balancing Forks Trick

You'll need:

Let's get started:

• Interlock the teeth of the two forks.
• Carefully place a match in between the tines of one fork, towards the base.
• Balance the match on the edge of the glass, letting the forks hang freely.

The science behind the magic: You've successfully defied gravity! This trick works because you've positioned the center of mass of the entire fork structure below the balancing point (the edge of the glass). Since the center of mass wants to be as low as possible, the forks remain stable and balanced.

2. The Rising Water Trick

• Sticky tack
• Pour a small amount of water onto the plate.
• Place the glass in the center of the plate.
• Light a match and let it burn for a few seconds.
• Quickly place the lit match under the glass, and watch the water rise!

The science behind the magic: This experiment demonstrates the power of air pressure. The heat from the flame causes the air inside the glass to expand. When the flame goes out, the air cools and contracts, creating a lower pressure inside the glass than outside. This pressure difference forces the water on the plate to be pushed up into the glass.

3. The Dancing Peanuts Experiment

• Carbonated water
• Fill the glass with carbonated water.
• Drop a few peanuts into the glass.
• Observe the peanuts as they sink, rise, and dance around in the glass!

The science behind the magic: This experiment showcases the concept of buoyancy and nucleation sites. The peanuts are initially denser than the carbonated water, causing them to sink. However, the rough surface of the peanuts provides nucleation sites for the carbon dioxide bubbles in the water to form. These bubbles attach to the peanuts, increasing their buoyancy and causing them to rise. As the bubbles detach at the surface, the peanuts sink again, creating a mesmerizing dance.

4. The Plate Suction Trick

• A wine glass
• A wet paper towel
• Attach the wet paper towel to the bottom of the wine glass using sticky tack.
• Light a match and hold it under the center of the plate for a few seconds.
• Quickly place the wine glass (with the wet paper towel facing down) onto the plate.
• Carefully lift the wine glass – the plate should stick to it!

The science behind the magic: Similar to the rising water experiment, this trick relies on air pressure. The heat from the match creates a low-pressure area inside the glass. When the glass is placed on the plate, the higher atmospheric pressure outside pushes the plate against the glass, creating a suction effect.

5. The Balloon Kebab Experiment

• A wooden skewer
• Inflate the balloon to a medium size.
• Carefully twist the neck of the balloon to create a tight seal.
• Dip the tip of the wooden skewer in a small amount of oil or petroleum jelly.
• Gently push the skewer through the thickest part of the balloon, near the neck and the opposite end.

The science behind the magic: You might think this is impossible, but it's all about understanding the properties of materials. The rubber in a balloon is made up of long chains of molecules called polymers. When you inflate a balloon, you're stretching these chains. By inserting the skewer through the areas where the balloon is less stretched (near the neck and opposite end), you're minimizing the stress on the rubber, allowing it to stretch without popping.

Unleash Your Inner Scientist!

These five physics experiments are just a glimpse into the fascinating world of science that surrounds us. So gather your materials, put on your thinking caps, and get ready to be amazed by the wonders of physics!

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AI Homework Helper for Grade 7 – Physics

Ask your xtutor about your grade 7 – physics homework.

Grade 7 – Physics Skills

• Understanding the scientific method and its application in physics experiments
• Ability to measure and calculate physical quantities accurately
• Knowledge of the basic principles of motion, including speed, velocity, and acceleration
• Understanding the concept of forces and their effects on objects
• Knowledge of different types of energy and their transformations
• Understanding the laws of conservation of energy and momentum
• Ability to analyze and interpret graphs and diagrams related to motion and energy
• Knowledge of the properties of waves, including frequency, amplitude, and wavelength
• Understanding the behavior of light, including reflection, refraction, and the formation of images
• Knowledge of the basic principles of electricity and magnetism
• Understanding the relationship between current, voltage, and resistance in electrical circuits
• Ability to solve problems involving simple machines and mechanical advantage
• Knowledge of the structure and properties of matter, including atoms and molecules
• Understanding the concept of heat and its transfer mechanisms
• Ability to apply the principles of physics to real-life situations and everyday phenomena

Grade 7 – Physics Curriculum

Grade 7 physics: exploring the fundamentals of the physical world.

Physics is a fascinating branch of science that helps us understand the fundamental principles governing the physical world around us. In grade 7, students delve deeper into the subject, building upon their previous knowledge and exploring new concepts. Let’s take a closer look at the topics taught in grade 7 Physics:

1. Motion and Forces

In this unit, students learn about the basic principles of motion and forces. They explore concepts such as:

• Speed, velocity, and acceleration
• Newton’s laws of motion
• Friction and its effects
• Gravity and its role in motion

The energy unit focuses on understanding different forms of energy and how it can be transferred or transformed. Key topics covered include:

• Kinetic and potential energy
• Conservation of energy
• Energy transfer and transformation
• Renewable and non-renewable energy sources

3. Heat and Temperature

In this unit, students explore the concepts of heat and temperature and their effects on matter. They learn about:

• Thermal energy and its transfer
• Conduction, convection, and radiation
• Measuring temperature and thermal expansion
• Heat transfer in everyday life

4. Light and Sound

This unit introduces students to the properties and behaviors of light and sound. They study:

• Reflection, refraction, and absorption of light
• The electromagnetic spectrum
• Sound waves, pitch, and volume
• How light and sound interact with matter

5. Electricity and Magnetism

The electricity and magnetism unit focuses on understanding the principles of electrical circuits and magnetism. Students explore:

• Electricity and its components (conductors, insulators, resistors)
• Series and parallel circuits
• Magnetism and electromagnetism
• Applications of electricity and magnetism in everyday life

6. The Solar System and Beyond

In this unit, students embark on a journey through space, exploring our solar system and the broader universe. They learn about:

• The structure and characteristics of the solar system
• Planets, moons, and other celestial bodies
• Gravity’s role in the motion of celestial objects
• Space exploration and the future of space travel

Grade 7 Physics provides students with a solid foundation in understanding the physical world and its phenomena. By exploring these topics, students develop critical thinking skills, scientific inquiry, and a deeper appreciation for the wonders of the universe.

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8th Grade Science Fair Projects

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Most students in 8th grade science fair projects get their first taste of real research projects when creating 8th grade science fair projects. Students select a scientific question, conduct library/Internet research, and plan an experiment before entering it in the fair.

Discover what makes a balloon remain buoyant when exposed to flame in this exciting experiment, which also serves to introduce students to physics. They can test out various temperature effects on soap bubbles as well as create their own teleidoscope!

Rube Goldberg Machine

Rube Goldberg machines, named for cartoonist Rube Goldberg, use deliberately overcomplicated designs to solve simple tasks in an entertaining and educational way. In particular, these devises provide valuable lessons about energy transference as well as gravity, momentum, and friction physics concepts.

Get students involved by assigning them tasks, then breaking them up into groups. Have each group design its machine on paper before adding one step at a time during class periods.

Groups should present their machine to the class and create a video showing its operation.

UV Beads transform from white to vibrant colors when exposed to sunlight or other ultraviolet (UV) sources, becoming wearable bracelets, zipper pulls, and other wearables to teach students about UV radiation’s harmful effects on living tissue.

Like human skin, beads change color quickly when exposed to UV light sources – alerting students of potential sun damage before it happens. They also react positively with most classroom UV lights sources.

Optical Illusions

Optic illusions aren’t simply entertaining; they can also teach us a great deal about our brain and visual system.

One such illusion is the Hermann grid illusion. Although at first glance it appears as an ordinary black and white grid, when examined closely you will detect dark dots near its intersections as your visual system processes information related to colors that contrast each other.

Other optical illusions distort length, position and curvature – such as the floating ship illusion which recently went viral.

Plants to the Beat

Students can witness plants grow and move to various types of music with this engaging experiment, learning plant biology as well as music and sound science in the process.

Students participating in this project will explore how stress affects body temperature or the effects of fertilizer runoff on plants, and gain an appreciation of how environmental issues can be solved through simple engineering and chemistry techniques as well as tie-in math and social studies coursework.

Tracking Animals

Tracking animals teaches children about them while developing analytical, spatial and symbolic thinking abilities. You can do it at home by scanning your yard for animal signs or at nearby parks and forests.

An effective starting point would be studying the prints of mammals (cats, dogs & deer). Once comfortable with mammals, move onto birds, amphibians or reptiles.

Use a book such as “Animal Skulls of North America” to identify species based on their distinctive features.

Nitrogen-Fixing Plants

Nitrogen is an essential nutrient for plants. Unfortunately, most can’t access nitrogen naturally in their environment and must rely on fertilizers as an external source. Some legumes (beans, peas and clover) form nodules with bacteria that fix nitrogen into nodules in order to access this essential resource.

Other nitrogen fixing plants that make great companions for food crops and forest gardens and permaculture landscapes include ceanothus, lupine, deerweed and California peashrub – native species such as ceanothus, lupine, deerweed and California peashrub can help provide much-needed nitrogen fixes in an ecological manner. As cover crop options in food production fields or with the chop-and-drop method of mulching (see Martin Crawford’s book “Creating a Forest Garden”) these native varieties provide ample nitrogen fixes in this aspect as companion plants for companion food crops while adding depth and diversity to these areas – perfect for forest gardens or permaculture landscapes!

Fingerprinting

Students can discover fingerprinting through this simple project, which can be completed in class using only an available kit. Not only will students gain experience fingerprinting but it will also teach about science, biology and data analysis.

Discover a piece of copper pipe with some neodymium magnets that fit through it, then have your 8th grader use this system to test if certain factors affect reaction times — for instance hunger/fullness levels and using their dominant hand as examples.

Flame-Resistant Balloons

Students participating in this exciting experiment will defy logic and successfully hold a flame to a balloon without it popping. Thanks to thermal conduction – the ability of materials to transfer heat from hotter surfaces to cooler surfaces – they will demonstrate its effectivity and discover an unexpected way of holding onto flame without it going out!

Balloons are typically constructed out of rubber, which is highly susceptible to heat. When filled with water, however, the balloon is better protected from being burned as its surface absorbs some of the heat produced by flame.

Garbage-Growing Plants

Use of trash to grow plants is a fun and educational way to teach kids where food comes from. “Garbage,” in this case, means the discarded roots, pits and seeds that would otherwise end up in landfills. Potting soil or soilless mix may serve as the ideal growing medium – hollowed-out carrots with pea gravel added can become flowering centerpieces; celery can even be coaxed into producing long fern-like stalks!

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10 Easy Science Fair Experiments for Kids, Parents and Teachers

Welcome to our collection of 10 easy science fair experiments for kids ! These hands-on activities are perfect for sparking curiosity and making learning fun. Whether you’re a parent, teacher, or young scientist, these experiments—from erupting volcanoes to DIY lava lamps—are designed to be simple, engaging, and educational. With a little help from an adult, you can dive into the world of science and discover how exciting it can be.

1. Erupting Volcano Experiment

Introduction: Welcome to our exciting science fair project—creating your very own erupting volcano! This experiment is perfect for first and second graders to learn about chemical reactions in a fun and spectacular way. You’ll need an adult to help with some steps, so make sure to have a grown-up nearby!

Objective: To observe and understand the chemical reaction between baking soda and vinegar that causes a volcanic eruption.

• 1 small plastic bottle (500 ml)
• Baking soda (60 grams)
• Vinegar (200 ml)
• Dish soap (5 ml)
• Red food coloring (a few drops)
• Modeling clay or playdough (enough to cover the bottle and form a mountain)
• A tray or shallow container (to catch the overflow)
• Measuring spoons and cups
• Safety goggles (optional, for extra fun and safety)

Hypothesis: Predict what will happen when you mix baking soda, vinegar, and a few other ingredients in your model volcano. Do you think it will erupt like a real volcano?

• Place the plastic bottle on the tray. This is your volcano’s “magma chamber.”
• Use the modeling clay or playdough to shape a mountain around the bottle. Leave the top open so you can add your ingredients.
• Get creative with the shape and details of your volcano!
• In a separate cup, mix together 200 ml of vinegar, 5 ml of dish soap, and a few drops of red food coloring to create your “lava.” This will help make the eruption more colorful and bubbly.
• Pour the vinegar mixture into the bottle in your volcano.
• Add 60 grams of baking soda to the bottle and quickly step back to watch your volcano erupt!

Observation: Watch closely what happens when the baking soda meets the vinegar mixture. You should see a foamy and fizzy eruption that looks like lava flowing down the sides of your volcano.

Results: Record what you observed. Was the eruption slow and steady, or quick and explosive? How high did the “lava” flow?

Conclusion: Explain why the reaction happened using simple science. When baking soda (a base) and vinegar (an acid) mix, they create carbon dioxide gas, which builds up pressure until it forces the liquid out in an eruption. This is similar to what happens in a real volcano, where gases build up pressure underground.

Further Experimentation:

Try the experiment again using different amounts of vinegar or baking soda. Does changing the amounts change how your volcano erupts?

This experiment not only teaches you about chemical reactions but also lets you create a mini spectacle at home or at your science fair. Have fun being a young scientist and remember to clean up after your experiment!

2. Floating Egg Experiment

Introduction: Dive into the fascinating world of density with the Floating Egg Experiment! This simple yet intriguing project is perfect for first and second graders to explore how different solutions affect whether an object sinks or floats. This experiment will need a bit of adult help, so make sure you have a grown-up to assist you!

Objective: To understand how the addition of salt to water changes its density and affects the buoyancy of an egg.

• Tap water (about 500 ml)
• Table salt (about 60 grams)
• 1 large clear glass or jar
• Measuring spoons
• Stirring spoon

Hypothesis: Before you begin, think about whether you believe the egg will float in plain water and what might happen when you add salt to the water. Write down your guess.

• Fill the glass or jar with 500 ml of tap water.
• Gently place the raw egg into the glass of plain water and observe what happens. Does it sink or float?
• Remove the egg carefully.
• Add 60 grams of salt to the water. Stir well until the salt is completely dissolved.
• Once the salt is dissolved, gently place the egg back into the saltwater solution. Observe what happens this time.

Observation: Note down what you see. How does the egg behave in plain water compared to the saltwater?

Results: Record your findings. Did the egg float in the saltwater? Was there a difference in how it behaved in the plain water compared to the saltwater?

Conclusion: Explain why the results occurred based on density. In plain water, the egg sinks because its density is higher than that of plain water. When you add salt to the water, it increases the water’s density, making it denser than the egg, which now floats.

You can experiment further by changing the amount of salt added to the water or trying different liquids like sugar water. See how these changes affect the egg’s buoyancy.

This experiment not only teaches you about the principles of density and buoyancy but also shows you how different solutions can change the behavior of objects in water. Have fun experimenting, and remember to ask questions and think about why things happen the way they do!

3. Rainbow Milk Experiment

Introduction: Get ready to create a swirling rainbow with the Rainbow Milk Experiment! This visually stunning project is ideal for young scientists in the first or second grade to explore the effects of soap on milk and food coloring. You’ll need some help from an adult, so be sure to have one nearby!

Objective: To observe how dish soap interacts with the fat in milk, causing movement in the food coloring that creates a rainbow effect.

• A shallow dish or plate
• Whole milk (enough to cover the bottom of the dish)
• Food coloring (various colors)
• Cotton swabs
• A dropper or small spoon

Hypothesis: Think about what you expect to happen when you add dish soap to the milk with food coloring. Do you think the colors will move, mix, or stay still? Write down your guess.

• Pour enough whole milk into the dish to just cover the bottom.
• Carefully add drops of different food coloring to the milk. Place them around the dish but not too close to each other.
• Dip a cotton swab into dish soap, ensuring it’s not dripping but wet with soap.
• Gently touch the soaped swab to the surface of the milk in the center of the dish or near one of the food coloring drops.

Observation: Watch what happens when the soapy cotton swab touches the milk. Look for any movement of the food coloring and how it interacts with the milk.

Results: Record what you see. Describe the movement and mixing of the colors. How did the dish soap affect the behavior of the food coloring in the milk?

Conclusion: Explain the science behind what you saw. The soap breaks the surface tension of the milk and reacts with its fats, creating movement that pushes the food coloring around. This movement shows how substances like soap can change the physical properties of other liquids like milk.

Try the experiment again using different types of milk (like skim or 2%) to see if the fat content affects the reaction. You can also use different detergents or soaps to see if they cause different patterns or movements in the milk.

This experiment is not only a beautiful display of colors but also a great lesson in chemistry and physics, showing how different substances interact in surprising and colorful ways. Enjoy creating your milk art, and don’t forget to clean up when you’re done!

 4. Baking Soda and Vinegar Rocket

Introduction: Blast off into the world of chemical reactions with the Baking Soda and Vinegar Rocket Experiment! This exciting activity is perfect for first and second graders eager to see science in action. You’ll need some adult supervision, so make sure a grown-up is ready to help with the fun!

Objective: To demonstrate the reaction between baking soda and vinegar and observe how this reaction can propel a homemade rocket.

• 1 small plastic film canister with a tight-fitting lid (or any small container with a pop-on lid that seals well)
• Baking soda (5 grams)
• Vinegar (30 ml)
• Tissue paper
• Safety goggles (to protect your eyes)
• An open space for launching your rocket (like a backyard or park)

Hypothesis: Predict what will happen when baking soda and vinegar mix inside your rocket canister. Think about how it might affect the canister and what the reaction will be like. Write down your prediction.

• Go outside or to a well-ventilated area where you can safely launch the rocket.
• Wrap the 5 grams of baking soda tightly in a small piece of tissue paper. This packet will help delay the reaction, giving you time to close the lid.
• Pour 30 ml of vinegar into the film canister.
• Quickly drop the baking soda packet into the canister with vinegar.
• Snap the lid on tightly and quickly place the canister on the ground, lid side down.
• Step back and watch what happens!

Observation: Observe the canister as the reaction happens. What do you see and hear? How high does the rocket go?

Results: Record the outcome of your experiment. Was the launch successful? How high did your rocket fly? Did it happen as you predicted?

Conclusion: Explain why the rocket moved. The reaction between baking soda (a base) and vinegar (an acid) produces carbon dioxide gas. This gas builds up pressure inside the canister until the lid pops off, pushing the rocket into the air. This is an example of Newton’s Third Law of Motion: for every action, there is an equal and opposite reaction.

Experiment with different amounts of vinegar and baking soda to see if it affects how high your rocket goes. You can also try different sizes of containers to see how they change the reaction.

This experiment is not only a thrilling demonstration of a chemical reaction but also a fun way to learn about forces and motion. Make sure to conduct it in a safe environment and wear your safety goggles to protect your eyes. Enjoy your scientific journey into rocketry!

5. Magnetic Magic – Magnetic Poles and Fields Experiment

Introduction: Explore the invisible world of magnetism with this engaging experiment! Perfect for first and second graders, this activity will help you understand how magnets work, focusing on the poles and the magnetic fields they create. You’ll need some common items from home or school and the help of an adult to guide you through.

Objective: To explore and visualize the magnetic field lines around bar and horseshoe magnets and understand the interactions between the different poles of magnets.

• 1 bar magnet (with North and South poles labeled)
• 1 horseshoe magnet (with North and South poles labeled)
• Iron filings
• A sheet of white paper
• A tray or cardboard to contain any mess
• A compass (optional, for further exploration)

Hypothesis: Before you start, think about what you might see when you sprinkle iron filings around the magnets. What do you think will happen when the North pole of one magnet is near the South pole of another? Write down your guess.

• Place the sheet of white paper on the tray or cardboard to keep your workspace clean.
• Lay the bar magnet and the horseshoe magnet on the paper. Start with them a good distance apart so their fields don’t overlap immediately.
• Gently sprinkle iron filings around and between the magnets. Be careful not to bump the table as the filings align themselves along the magnetic field lines.
• Look at how the iron filings arrange themselves around each magnet. Notice the patterns they form. These lines show the magnetic fields emanating from the poles.
• Slowly move the North pole of one magnet towards the South pole of the other. Observe how the iron filings react. Do the same with like poles (North to North or South to South) and note any differences.

Observation: Record what happens to the iron filings as you move the magnets. How do the patterns change? What does this tell you about how the magnetic poles interact?

Results: Describe the arrangement of iron filings and what it indicates about the magnetic fields. Note any changes when different poles are near each other.

Conclusion: Explain your observations in terms of magnetic poles and fields. Magnets attract when opposite poles are near each other and repel when like poles are close. The iron filings align themselves along the lines of magnetic force, visibly showing the shape of the magnetic fields.

Try using a compass to see how the needle aligns with the magnetic fields. You can also test different materials to see if they are influenced by the magnets, like clips, aluminum foil, or copper wire.

This experiment not only teaches you about magnetism but also lets you see the invisible forces at play. Have fun exploring and always make sure to clean up your space when you are done!

6. DIY Lava Lamp Experiment

Introduction: Ready to light up your curiosity with a colorful DIY Lava Lamp? This experiment is fantastic for young scientists in first or second grade to explore the interactions between oil, water, and effervescent tablets. This safe and simple project is sure to dazzle and teach important scientific concepts with a bit of adult help.

Objective: To understand the effects of density and chemical reactions by creating a homemade lava lamp.

• 1 clear plastic bottle (1 liter)
• Water (about 400 ml)
• Vegetable oil (about 600 ml)
• Food coloring (any color you like)
• Effervescent tablets (like Alka-Seltzer)
• Flashlight (optional, for effect)

Hypothesis: Think about what will happen when you mix oil, water, and the effervescent tablet in the bottle. Predict how the ingredients will interact and what will happen when you add the tablet.

• Fill the clear plastic bottle with 400 ml of water.
• Slowly pour 600 ml of vegetable oil into the bottle, allowing it to layer on top of the water.
• Add a few drops of food coloring to the bottle. The drops will pass through the oil and mix with the water below.
• Break an effervescent tablet into a few pieces.
• Drop one piece into the bottle and watch as the lava lamp effect begins. The tablet reacts with the water to create gas bubbles that rise and fall through the oil.
• Shine a flashlight through the bottom of the bottle to enhance the visual effect, especially in a dim room.

Observation: Watch the bubbles of colored water rise and fall in the oil as the gas bubbles form and pop. Note how the oil and water do not mix.

Results: Describe what you see when the effervescent tablet reacts in the water and how it affects the oil and water mixture.

Conclusion: Explain the science behind the lava lamp. The water and oil separate due to their different densities, with oil being less dense and sitting on top of the water. The effervescent tablet reacts with the water to create carbon dioxide gas, which carries the colored water up through the oil until the gas escapes at the top.

Try using different amounts of oil or water, different colors of food coloring, or different types of effervescent tablets to see how it changes the reaction.

This experiment not only makes for an eye-catching display but also helps understand concepts like density, solubility, and gas formation. Have fun watching your very own lava lamp glow!

 7. Dancing Raisins Experiment

Introduction: Get ready to watch raisins dance in this fun and simple science experiment perfect for young students in first or second grade. This activity demonstrates the principles of buoyancy and gas production in a way that’s both entertaining and educational, with just a bit of adult supervision needed.

Objective: To observe and understand why raisins move up and down in a fizzy liquid due to the formation of gas bubbles.

• 1 clear glass or transparent plastic cup
• Plain water (enough to fill the glass three-quarters)
• Carbonated clear soda (enough to fill the glass)
• Several raisins (4-6)
• A stopwatch or timer (optional, to record the duration of the dance)

Hypothesis: Before starting, predict what will happen when you drop raisins into the soda. Do you think they will sink, float, or dance? Write down your guess.

• Fill the glass three-quarters with plain water and top it off with carbonated soda to make the liquid fizzy.
• Carefully drop 4 to 6 raisins into the glass of fizzy liquid.
• Watch what happens to the raisins for the next few minutes. Observe how they move in the glass.

Results: Record your observations. Do the raisins sink, float, or dance up and down? How long do they continue moving?

Conclusion: Explain the results using the concept of buoyancy and gas production. The carbon dioxide bubbles from the soda attach to the rough surface of the raisins, making them buoyant enough to rise to the surface. Once they reach the top, the bubbles pop, and the raisins sink again. This cycle repeats, causing the dancing effect.

Experiment with different carbonated drinks or try other small, dried fruits or objects like corn kernels or small pasta shapes to see if they also dance. Explore how temperature affects the rate of dancing by using cold versus room temperature soda.

This experiment is a fantastic way for kids to visually grasp scientific concepts and enjoy the magic of simple chemical reactions. It’s perfect for a science fair project or a classroom activity!

8. Color-Changing Carnations

Introduction: Discover how flowers drink water with the Color-Changing Carnations Experiment! This visually stunning activity is perfect for first and second graders to learn about plant biology and capillary action in a fun and colorful way. It’s a simple experiment that requires some adult supervision.

Objective: To demonstrate how plants absorb water and nutrients up through their stems, using carnations and colored water.

• White carnations (several, depending on how many colors you want to test)
• Clear glasses or vases (one for each color)
• Food coloring in various colors
• Scissors (to be used by an adult)

Hypothesis: Predict what will happen when the carnations are placed in colored water. Which colors do you think will show up best in the petals?

• Have an adult trim the stems of the carnations at an angle to allow them to absorb water more efficiently.
• Fill each glass or vase with water and add about 20 drops of food coloring to each, choosing different colors for each container.
• Stir the water to evenly distribute the color.
• Place one carnation in each colored water vase.
• Observe the carnations daily to see how the color travels up the stem and changes the color of the petals.

Results: Record your observations over several days. Note the changes in the color of the petals and how quickly each color appears.

Conclusion: Explain how capillary action works in plants, drawing water and nutrients up through tiny tubes in the stem. The food coloring shows this process visually, changing the color of the carnations’ petals.

Try using different liquids like sports drinks or diluted inks to see if they affect the flowers differently. Experiment with other white flowers to see if they absorb colors faster or slower than the carnations.

9. Invisible Ink

Introduction: Send secret messages with the Invisible Ink Experiment! This project is a fantastic way for first and second graders to learn about chemical reactions and the properties of acids and bases, with just a bit of adult supervision for safety.

Objective: To use a natural acid (lemon juice) to write invisible messages that appear only when heated.

• Spoon or brush
• White paper
• Heat source (light bulb or hair dryer; an adult should handle this part)

Hypothesis: Guess what will happen when you heat the paper that has lemon juice on it. How do you think the message will appear?

• Squeeze lemon juice into a bowl and add a few drops of water.
• Dip the spoon or brush into the lemon juice mixture and write a message on the white paper.
• Allow the paper to dry completely, making the message invisible.
• Have an adult help you heat the paper using a light bulb or hair dryer. Watch as the message slowly appears.

Results: Record what happens when the paper is heated and how clearly the message shows up.

Conclusion: Explain why the lemon juice message appears when heated (lemon juice, being acidic, weakens the paper fibers slightly and caramelizes when heated, making it visible).

Experiment with other natural acids like orange juice or vinegar. Try different heating methods or papers to see which reveals the message most effectively.

10. Homemade Slime Experiment

Introduction: Get ready for gooey fun with the Homemade Slime Experiment! This engaging and tactile project is great for first and second graders to learn about polymers and non-Newtonian fluids. Adult supervision is recommended, especially when handling chemicals.

Objective: To create slime using simple household ingredients and explore its unique properties.

• White school glue (about 120 ml)
• Borax powder (2 teaspoons)
• Water (two cups)
• Food coloring (optional)
• Mixing bowl

Hypothesis: Predict what will happen when you mix glue, borax, and water. What kind of texture do you think your slime will have?

• In a mixing bowl, combine 120 ml of white glue and one cup of water. Add a few drops of food coloring if desired.
• In another container, dissolve 2 teaspoons of borax in one cup of warm water.
• Slowly add the borax solution to the glue mixture, stirring continuously.
• Keep stirring until the slime begins to form and pull away from the sides of the bowl.
• Take the slime out and knead it with your hands until it reaches the desired consistency.

Results: Describe the texture and behavior of your slime. Is it stretchy? Does it bounce?

Conclusion: Discuss the chemical reaction between the glue and borax that creates a polymer, which gives the slime its unique properties.

Try adding different amounts of borax or glue to see how it changes the slime’s properties. Add glitter, beads, or small toys to create different types of slime.

Each of these experiments offers a fun, educational way to engage with basic scientific concepts, perfect for young learners eager to explore the world through science.

That’s a Wrap!

Science is all about curiosity, discovery, and having fun while learning how the world works. Through these 10 experiments, young scientists have not only created colorful reactions and gooey slime but also gained a deeper understanding of important scientific principles. Whether it was watching a volcano erupt, making an egg float, or exploring the magnetic fields, each experiment has shown that science is everywhere—even in the simplest things around us. As you continue to explore and experiment, remember that the journey of discovery is just beginning. Keep asking questions, keep experimenting, and most importantly, keep having fun with science!

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Year 7 - Living systems - L1 Worksheet /Table (Cells)

Subject: Biology

Age range: 7-11

Resource type: Worksheet/Activity

Last updated

8 September 2024

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Activity sheet for labeling organelles in animal and plant cell, and identifying functions. Also has the answers (Mark scheme).

Could be used for plenary.

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