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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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Students will investigate the illumination durations and intensities of different luminous substances of different colors of the spectrum.
High School
Medium
The purpose of this science fair project is to determine whether it takes more force to move an object over a smooth surface or a rough surface.
Elementary School
First Grade
In this free science fair project idea, we learn about how insulators preserve heat and warmth by preventing energy transfer.
Middle School
Chemistry
Purpose of science fair project: does pre-washing lettuce with a vinegar and water solution remove more bacteria than washing with only water?
Elementary School
Fifth Grade
The purpose of this science fair project is to determine which household products are acids or bases.
Elementary School
First Grade
In this free science fair project, explore what are circumpolar stars by modeling the motion of circumpolar stars at Earth's poles.
Middle School
Astronomy
Garlic has a distinctive smell health benefits. The purpose of this science fair project is to determine whether garlic inhibits the growth of bacteria.
Middle School
High School
The objective of this experiment is to college and evaluate the nocturnal insect population in your area and evaluate your sample for health hazards.
Middle School
High School
The sun's internal structure consists of four different zones varying in temperature and texture.  Do this science fair project to learn what they are.
Middle School
Astronomy
This science fair project determines if heat will be released or absorbed during certain acid/base chemical reactions.
Middle School
High School

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