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High School Science Fair Projects

Need a science fair project that's fun, engaging, and appropriately rigorous for a high school science fair? Education.com 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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Showing 1 to 15 of 33
This science fair project examines the different composition of fungi and plants.
High School
Ninth Grade
Learn about plant growth with this science fair project using a pinto bean plant! Use Education.com for science fair project ideas.
High School
Middle School
Learn how to test for the production of carbon dioxide by respiration in plants with this science fair project.
High School
Middle School
Science fair project that examines how light wavelengths affect photosynthesis in the aquatic plant: Elodea.
Seventh Grade
Eighth Grade
Science fair project that compares leaf pigments of various tree species. Which tree species do you think will have the most pigments and why?
Seventh Grade
Eighth Grade
Science fair project idea that compares number and relative sizes of leaf stomata. Collect leaves of plant species, identify, observe stomata with microscope.
Ninth Grade
Tenth Grade
Science fair project that examines the physical characteristics of soil in order to learn about soil permeability and other environmental properties.
Fifth Grade
Sixth Grade
Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.
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
This science fair project challenges students to research and interact with the animals and plants that live in tide pools and test a practical use of tidepools
High School
Middle School
This science fair project will go beyond the simple definition of conservation to explore the different facets of what conservation means.
High School
Middle School

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