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1000 Science Fair Projects with Complete Instructions

10 Best Science Fair Projects

10 Best Science Fair Projects

Check out our Top 10 Best Science Fair Projects! Finding the best science fair project can be tough, but we've made it easy by selecting the best science project from each category and including its topic. Get inspired by these science projects and create the best science fair project ever! Explore more cool science fair project ideas by grade level at the top of this page.

  1. Jet Lag in Hamsters (circadian rhythm, Biology science fair project)

  2. Egg with Vinegar (acid/base reaction, Chemistry science fair project)

  3. Galileo's Inclined Plane Experiment (acceleration, Physics science fair project)

  4. Plant's Favorite Color for Photosynthesis (color for photosynthesis, Botany science fair project)

  5. Color and Taste (color perception, Psychology science fair project)

  6. Does Dog Saliva Kill Bacteria? (antibacterial, Microbiology science fair project)

  7. Decomposing Plastic Spoons (biodegradable materials, Environmental Science science fair project)

  8. Super Hero Egg Shells (structural engineering, Engineering science fair project)

  9. Music Math: Playing Notes with Equations (music, Math science fair project)

  10. Temperature's Effect on Seawater (climate change, Earth Science science fair project)

Hamster Exercise Wheels and Simulated Jet Lag
1. Hamster Exercise Wheels and Simulated Jet Lag
Shift a hamster's light schedule and track how many days it takes for wheel activity to recover.
Hard
Vinegar and the Rubbery Egg
2. Vinegar and the Rubbery Egg
Drop a raw egg into vinegar for a few days and discover that the acid dissolves the hard shell, leaving behind a soft, rubbery egg.
Easy
Galileo's Inclined Plane and Acceleration
3. Galileo's Inclined Plane and Acceleration
Rebuild Galileo's 1638 ramp and water clock to prove that a rolling ball speeds up as it descends.
Hard
Light Color and Elodea Oxygen Production
4. Light Color and Elodea Oxygen Production
Place an aquatic plant under five colors of light and measure which one drives the most oxygen production.
Medium
Beverage Color and Flavor Perception
5. Beverage Color and Flavor Perception
Dye four identical lime drinks different colors and see how many people taste flavors that match the color instead.
Medium
Dog Saliva and Bacterial Growth Inhibition
6. Dog Saliva and Bacterial Growth Inhibition
Collect saliva from 102 dogs and place it on E. coli lawns to measure how many samples create bacteria-free rings.
Hard
Biodegradable Spoon Decomposition
7. Biodegradable Spoon Decomposition
Bury three types of spoons in soil for 30 days and weigh them to find out which ones actually decompose.
Medium
Eggshell Arches and Load-Bearing Strength
8. Eggshell Arches and Load-Bearing Strength
Cut four eggs into domes and stack books on top to see how much weight the arches can hold.
Easy
String Length and Musical Notes
9. String Length and Musical Notes
Calculate a single ratio that predicts every note on a monochord and confirm it by plucking the string at each calculated length.
Hard
Seawater Temperature and Chemistry
10. Seawater Temperature and Chemistry
Heat ten beakers of seawater to different temperatures and track how the pH and density change over 24 hours.
Medium

Science Fair Project FAQ

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 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!

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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