Science Fair Project Ideas 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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This science project challenges students to take learned information about weather and  climate control and apply it to larger issues like global warming.
High School
It has long been believed that weather influences mood and behavior. This experiment will evaluate if weather can really impact the way people feel.
Middle School
Sixth Grade
This science fair project idea uses the process of chemical weathering to change a mineral.
Elementary School
Analyze temperature and precipitation data to determine whether current weather conditions are outside the historical norm.
Middle School
High School
Looking for a way to liven up a hot summer day? A little hands-on science is the perfect way to keep your kid occupied. So why not recruit your budding scientist and conduct an experiment or two?
Elementary School
Science Fair Project Ideas
Science fair project that examines condensation and the conditions needed in order for dew to form.
Second Grade
Third Grade
Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?
Third Grade
Fourth Grade
This experiment challenges students to forecast the weather based on the surrounding areas' weather.
Elementary School

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