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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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In this free science fair project idea, we learn about how static fluids exert force on their environment.
Middle School
Physics
In this free science fair project idea, we learn about buoyancy and how liquids push objects upward.
Middle School
Physics
This project examines the concentration of dissolved oxygen in water, with and without oil.
Eighth Grade
Hard
This science fair project idea compares biodiversity between drops of water.
Elementary School
Third Grade
In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.
Fifth Grade
Physics
The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.
Sixth Grade
Physics
Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.
Kindergarten
Botany
Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.
Fifth Grade
Astronomy
Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.
Second Grade
Geology

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