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3rd Grade Science Fair Projects

For their 3rd grade science projects, kids begin investigating the answers to their questions much like actual scientists would. Instead of simply collecting qualitative data (describing what they observe), 3rd graders graduate to collecting and presenting quantitative data by measuring their results with increased accuracy, communicating their findings in simple charts and graphs, and describing their observations in written prose. Education.com's collection of 3rd grade science fair projects give kids the opportunity to apply their newly acquired skills to thinking critically about the world around them while having serious fun in the process. Browse our collection of third grade science projects and experiments by using the boxes to the left to filter by topic, and find that exciting science project your child will be sure to love.

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Showing 1 to 11 of 11
In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!
Third Grade
Astronomy
Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.
Third Grade
Astronomy
Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!
Third Grade
Astronomy
Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.
Third Grade
Astronomy
Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body--your arm!
Third Grade
Engineering
The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!
Third Grade
Astronomy
Collect meteorite dust with a magnet in your very own backyard!  The objective of this science fair project is to gather meteorite dust to study outer space.
Third Grade
Astronomy
This science fair project idea explores how length affects the weight a bridge can hold.
Third Grade
Engineering
What is a compound microscope? Kids find out by making one of their own in this cool science fair project.
Third Grade
Engineering
This science fair project idea examines the reason boats are shaped and engineered.
Third Grade
Engineering

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