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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This experiment will explore the possibility of a connection between lunar cycles and how humans are affected.
High School
Earth & Space Science
This experiment investigates whether the primacy effect is observed more frequently in specific populations of people.
High School
Ninth Grade
This science fair project idea tests whether it is true that humans are in the morning than later during the day/night.
High School
Middle School
Demonstrate the relationship between mass, volume and density. Measure displaced water, and weigh object to calculate mass and density.
Tenth Grade
Eleventh Grade
This experiment will examine and precisely measure the amount of sugar in various sodas.
High School
This experiment will explore if and where fractals can be found in the natural world.
High School
This experiment examines whether social orientation (extroversion or introversion) is correlated with memory.
High School
Behavioral/Health Science

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