High School Science Fair Projects

Need a science fair project that's fun, engaging, and appropriately rigorous for a high school science fair? has assembled a rich collection of high school science fair projects and high school science fair project ideas written by our team of professional scientists, science teachers, and educational consultants. We offer free high school science experiments on every science fair topic, including physics, chemistry, biology, engineering, and even psychology. Check the boxes in the sidebar to filter your results, or use the search bar to find a winning idea for your upcoming science fair. Hundreds of good science fair projects are only a click away.

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High School
Middle School
Science fair project determines relationship between number and variety of insects and spiders by collecting and counting invertebrates in a ecosystem.
Fifth Grade
Sixth Grade
Science fair project which compares the quantity of cells in the different phases of mitosis by observing the cells of an onion root tip.
Ninth Grade
Tenth Grade
Examine the impact of insecticides on plant growth.
Sixth Grade
Seventh Grade
Science fair project which determines whether a person's taste in music is dictated by the key that the song is written in.
Fifth Grade
Sixth Grade
Science fair project which examines the chemical reaction of a candle flame with various gases in order to determine the identity of the gas.
Seventh Grade
Eighth Grade
Science fair project which determines which colors of light allow plants to produce the most chlorophyll. How are color and light related to each other?
Seventh Grade
Eighth Grade

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