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57 Science Projects for 7th Graders

57 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!

Hamster Alertness and Time of Day
1. Hamster Alertness and Time of Day
Build a maze for a hamster and time its runs at four hours of the day to discover peak alertness.
Medium
Garlic Chives and Crowding
2. Garlic Chives and Crowding
Pack 50 garlic chives seeds into one pot and only 2 into another, then track which group grows taller over 10 days.
Easy
Surface Tension and Water Strider Design
3. Surface Tension and Water Strider Design
Design a model insect from simple materials and see if you can make it stand on water using surface tension.
Medium
Human Body Battery
4. Human Body Battery
Create an electric current using your own body!
Easy
Antibubbles: Air-Skinned Spheres Underwater
5. Antibubbles: Air-Skinned Spheres Underwater
Squeeze a jet of soapy water through a surface droplet and watch air-coated spheres drift underwater with rainbow colors.
Medium
Clay Soil and Electrical Charge
6. Clay Soil and Electrical Charge
Lower two battery-connected wires into muddy water and discover which terminal attracts clay particles.
Medium
Glow Stick Duration and Temperature
7. Glow Stick Duration and Temperature
Place glow sticks in water from near-freezing to warm and discover the surprising tradeoff between brightness and how long they last.
Medium
Eggshell Staining and Drink Acidity
8. Eggshell Staining and Drink Acidity
Soak hard-boiled eggs in different drinks for two days and see which ones stain and soften the shells the most.
Easy
Cooking and Vitamin C in Fruit
9. Cooking and Vitamin C in Fruit
Test raw and cooked tomatoes and cherries with an iodine solution to discover whether cooking destroys or concentrates vitamin C.
Medium
Light Sources and Phosphorescent Glow
10. Light Sources and Phosphorescent Glow
Charge glow-in-the-dark stickers with four different lamps and discover which type of light keeps them glowing longest.
Medium
Borax Geode Crystals
11. Borax Geode Crystals
Turn a hollow eggshell into a miniature geode by growing Borax crystals inside it overnight.
Medium
Chocolate and the Rock Cycle
12. Chocolate and the Rock Cycle
Use chocolate shavings and heat to build three types of model rock that match real geology.
Medium
Sugar Crystallization and Rock Candy
13. Sugar Crystallization and Rock Candy
Grow giant sugar crystals on a string and watch a supersaturated solution turn back into solid rock candy.
Medium
Scratch Testing and Rock Hardness
14. Scratch Testing and Rock Hardness
Scratch rocks with everyday objects like coins and nails to rank their hardness on the Mohs scale.
Medium
Casein Glue from Milk and Vinegar
15. Casein Glue from Milk and Vinegar
Milk contains a protein that turns into working glue when you add vinegar and a pinch of baking soda.
Medium
Pressure, Smoke, and Cloud Formation
16. Pressure, Smoke, and Cloud Formation
Drop a lit match into a jar with water vapor and seal it with a plastic bag. Pull the bag outward and watch a real cloud form inside.
Medium
Surface Temperature and Fingerprint Clarity
17. Surface Temperature and Fingerprint Clarity
Press your finger on glasses at six different temperatures, then dust with cocoa powder to see which surface captures the clearest print.
Medium
Beverage Stains on Tooth Enamel
18. Beverage Stains on Tooth Enamel
Soak five teeth in coffee, tea, grape juice, red wine, and cola to discover which beverage leaves the darkest stain.
Easy
Soft Drink Packaging and Carbonation Levels
19. Soft Drink Packaging and Carbonation Levels
Weigh Coca-Cola in glass, plastic, and aluminum containers before and after shaking to measure how much carbon dioxide each one holds.
Medium
Salt, Heat, and Surface Tension Strength
20. Salt, Heat, and Surface Tension Strength
Drop rice grains onto foil floating in pure and salt water at five temperatures to map how surface tension weakens.
Medium
Caffeine, Coffee, and Mung Bean Growth
21. Caffeine, Coffee, and Mung Bean Growth
Water mung bean sprouts with caffeine solution, coffee mixture, and plain water to discover which makes them grow tallest.
Medium
Coca-Cola and the Meat Dissolving Myth
22. Coca-Cola and the Meat Dissolving Myth
Soak steak, chicken, and salmon in Coca-Cola for five days and find out whether the famous dissolving myth holds up.
Easy
Golf Ball Bounciness and Driving Distance
23. Golf Ball Bounciness and Driving Distance
Drop three brands of golf balls to rank their bounciness, then hit them at a driving range to see if the springiest flies farthest.
Medium
Feeder Color and Bird Attraction
24. Feeder Color and Bird Attraction
Paint five bird feeders in different colors and discover which one draws the most visitors over five days of observation.
Medium
Classical Music vs. Ballads for Sleep
25. Classical Music vs. Ballads for Sleep
Track how long it takes to fall asleep with classical music versus sentimental ballads and discover which genre wins.
Hard
Skateboard Bearing Quality and Roll Distance
26. Skateboard Bearing Quality and Roll Distance
Swap five different bearing brands into a skateboard and measure how far it rolls from a ramp to find out if price matches performance.
Medium
Earthworms and Plant Growth
27. Earthworms and Plant Growth
Add earthworms to half your pots, plant three types of seeds, and measure which group grows taller in just eight days.
Medium
Orange Ripeness and Vitamin C Content
28. Orange Ripeness and Vitamin C Content
Squeeze juice from unripe, half-ripe, and ripe oranges, then count iodine drops to find which stage holds the most vitamin C.
Medium
Bird Size and Perching Distance
29. Bird Size and Perching Distance
Measure the gap between perching crows and sparrows on a power line to find out if bigger birds demand more space.
Medium
Suspension Stiffness and Cornering Speed
30. Suspension Stiffness and Cornering Speed
Swap springs of different stiffness into a remote-controlled car and time it on straight and curved courses to find the fastest setup.
Medium
Hydroponics vs. Soil for Peperomia Root Growth
31. Hydroponics vs. Soil for Peperomia Root Growth
Plant Peperomia stems in soil and in nutrient solution side by side, then compare which method grows longer roots in three weeks.
Medium
Arch Length and Load-Bearing Strength
32. Arch Length and Load-Bearing Strength
Bend plywood strips of eight different lengths into arches and measure how many kilograms each one holds before it snaps.
Hard
Bridge Side Walls and Crosswind Resistance
33. Bridge Side Walls and Crosswind Resistance
Build three model bridges with different side coverings and measure which one tilts the most in crosswind from a fan.
Medium
Meat Thawing Methods and Bacteria Growth
34. Meat Thawing Methods and Bacteria Growth
Thaw frozen chicken three different ways and grow the bacteria from each on agar plates to see which method is safest.
Medium
Bird Beak Shapes and Diet
35. Bird Beak Shapes and Diet
Match bird beaks to hardware store tools and use the tool's purpose to predict what each bird eats.
Medium
Health Habits of Seventh Graders
36. Health Habits of Seventh Graders
Survey 100 seventh graders about their daily health habits. Compare their answers to what their bodies actually need.
Medium
Reading Aloud and Memory Recall
37. Reading Aloud and Memory Recall
Show participants flash cards twice -- once silently, once read aloud -- and compare how many words they recall each time.
Medium
Height, Weight, and Potential Energy
38. Height, Weight, and Potential Energy
Drop and swing objects of different weights from different heights to see how potential energy changes.
Medium
Lemon-Powered LED Light
39. Lemon-Powered LED Light
Turn a lemon into a working battery and find out whether it can produce enough electricity to light an LED.
Easy
Rainbow Borax Crystals
40. Rainbow Borax Crystals
Grow sparkling rainbow crystals overnight on pipe cleaners and watch solid crystal structures form as the Borax water cools.
Medium
Planet Layers in a Bottle
41. Planet Layers in a Bottle
Shake a bottle of mixed materials and watch layers form the same way a rocky planet builds its inner structure.
Medium
Pocket Solar System to Scale
42. Pocket Solar System to Scale
Fold a strip of paper into a pocket-sized model that shows the real distances between the Sun and each planet.
Medium
Play-Doh Solar System to Scale
43. Play-Doh Solar System to Scale
Shape Play-Doh into scale-sized planets and discover how tiny Earth looks next to Jupiter.
Easy
Ice Wedging and Rock Breakdown
44. Ice Wedging and Rock Breakdown
Freeze water inside plaster of Paris and watch ice wedging crack it apart, just like real rocks in winter.
Medium
Cornstarch Oobleck and Shear Thickening
45. Cornstarch Oobleck and Shear Thickening
Punch a bowl of cornstarch and water and discover a liquid that turns solid under force, then flows the moment you stop.
Easy
Vinegar Fizz Test for Calcite in Rocks
46. Vinegar Fizz Test for Calcite in Rocks
Drop vinegar on a rock and watch for fizzing bubbles that reveal hidden calcite inside.
Easy
Rock Porosity and Water Storage
47. Rock Porosity and Water Storage
Soak different rocks in water and discover which ones hold the most liquid like underground sponges.
Medium
Water Displacement and Rock Density
48. Water Displacement and Rock Density
Drop rocks into water to find their volume, then calculate which rock types pack in the most matter.
Medium
Pet Rock and the Rock Cycle
49. Pet Rock and the Rock Cycle
Identify your pet rock's type and trace its journey through the rock cycle to see how it could transform.
Medium
Crayons and the Rock Cycle
50. Crayons and the Rock Cycle
Transform crayons into three types of model rocks and see how the real rock cycle works.
Medium
Sidewalk-Scale Solar System
51. Sidewalk-Scale Solar System
Shrink the solar system to sidewalk size and discover how surprisingly far apart the planets really are.
Medium
Egg Drop Survival Challenge
52. Egg Drop Survival Challenge
Design a protective case from household materials and find out whether your raw egg survives a high drop.
Medium
Pre-Soaked Spaghetti and Cooking Time
53. Pre-Soaked Spaghetti and Cooking Time
Soak spaghetti in water for a few hours, then boil it for just one minute to test whether pre-soaking cuts cooking time.
Medium
Red Cabbage pH Lava Lamp
54. Red Cabbage pH Lava Lamp
Add Alka-Seltzer to a red cabbage lava lamp and watch the blobs shift color as you change the pH.
Medium
Paper Airplane Folds and Flight Distance
55. Paper Airplane Folds and Flight Distance
Fold paper airplanes with different designs and launch them to discover which shape flies the farthest.
Medium
Chocolate Cookies and Asphalt Paving
56. Chocolate Cookies and Asphalt Paving
Mix chocolate binder with oats and nuts the same way engineers mix asphalt with rocks, then roll it flat like a road.
Medium
Miniature Lightning from Static Charge
57. Miniature Lightning from Static Charge
Rub styrofoam with a wool sock and touch an aluminum pie plate to create a visible spark in the dark.
Easy

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

  • Glow Sticks: Temperature Effects

  • Solar System Scale Model on the Sidewalk

  • Geode Rock Borax Crystal

  • Making Lightning in a Pan

  • Make Plastic from Milk

  • Color and Taste

  • Uncovering Fall Colors

  • The Dissolving Meat Myth

Science fair project details right above the FAQ!

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

  • Glow Sticks: Temperature Effects

  • Tooth Decay Experiment with Eggs

  • Does Cooking Deplete Vitamin C?

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?

Science museums are great places to explore if you're looking for inspiration for your next science fair project or just want to learn more about science. Science museums, natural history museums, space museums, and discovery museums are all great places to do that! You can discover all sorts of interesting things about science and find cool project ideas for science fairs.

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?

Science fair projects are a fun and unique way to discover science by asking a question and doing a science project. We'll help you find a science fair project idea and guide you through the process of doing and presenting your science fair project with Science Fair Coach's Science Fair Project Guide.

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

If you have a science fair project idea, Science Fair Coach can help you turn it into a full science fair project! Starting at Introduction to Science Fairs, we'll guide you through how to do a science fair project, from designing and conducting your experiment to collecting and analyzing your findings. Then, we'll help you showcase your results on a science fair board with our Guide to Science Fair Posters.

How do I make a science fair board?

Your science fair board is where you show off your science fair project for everyone to see and learn from. With our Guide to Science Fair Posters, you can make sure your science fair board stands out and impresses at the science fair!

What is the scientific method?

The 7 steps of the scientific method helps us understand how nature works. Learn how the scientific method is used in a science fair project example, and how it's evolved through history as scientists used different ways to learn about nature with our Guide to the Scientific Method!

What is the engineering design process?

The 6 steps of the engineering design process helps us design an effective solution to a problem. Learn how to use the engineering design process with the example of the egg drop challenge in our Guide to the Engineering Design Process!

Where can I find a science fair competition?

Science fair competitions are an excellent opportunity to explore science. One of the of the premier science advocacy organizations, the Society for Science, is associated with more than 400 science fair competitions in almost every US state, as well as over 70 other countries, regions, and territories. You can find out if there's a Society of Science affiliated science fair near you!

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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