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Science Fair Project Ideas

Education.com has assembled a vast collection of science fair project ideas written by science teachers, professional scientists, and educational consultants on popular science fair topics ranging from physics and chemistry to biology and even sociology. We offer free science fair ideas suitable for every grade level, be it preschool, kindergarten, elementary school, middle school, or high school. Check the boxes in the sidebar to filter your results, or use the search bar to find that perfect science fair project or experiment your child will be sure to love.

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This science fair project idea's objective is to understand the concept of air pollution and examine the quality of air in our environments.
Third Grade
Ecology
This science fair project idea's objective is to become familiar with items your family regularly throws in the trash.
Second Grade
Ecology
Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.
Seventh Grade
Ecology
Science fair project that models the subterranean movement of water, using Darcy's Law. How can this information be used in hazardous material spills?
Sixth Grade
Seventh Grade
Science fair project that examines learn how the angle of incidence affects the efficiency of solar panels. How does a solar cell work?
Sixth Grade
Seventh Grade
The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.
Fifth Grade
Ecology
Check out this cool and free middle school science fair project idea on how to make a solar oven.
Seventh Grade
Easy
The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.
Fourth Grade
Easy
What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!
Fifth Grade
Easy

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