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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 experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.
Second Grade
Ecology
This science fair project idea's objective is to understand the concept of air pollution and examine the quality of air in our environments.
Third Grade
Ecology
In this free science fair project idea, we learn about rock layering and how the geological process of horizontal layering occurs.
Middle School
Earth & Space Science
Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.
Seventh Grade
Ecology
In this science fair project, learn how to model the hydrologic cycle, the continuous interchange of water between the oceans, land, plants, and clouds.
Middle School
High School
The projects describes the correlation between Gravel Run and Centreville Landing in terms of pH, dissolved oxygen, turbidity, and temperature.
Middle School
Ecology
Science fair project idea on designing a model of Galileo's thermometer and find relationship between the Fahrenheit, Celsius, and Kelvin temperature scales.
Middle School
Chemistry
Step by step free science fair project idea for you to explore the center of the hurricane and why the eye of the hurricane is motionless.
Elementary School
Earth & Space Science
The goal of this science fair project is to evaluate the effect of heat on sound wave frequency.
Seventh Grade
Eighth Grade
This project examines the concentration of dissolved oxygen in water, with and without oil.
Eighth Grade
Hard
Science fair project that determines how UV radiation emitted by the sun varies depending on the time of day, using a handheld UV detector
Sixth Grade
Seventh Grade

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