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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 an exciting science project your child will be sure to love.

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In this physics project, learn about the relationship between light intensity and distance  using a laser pointer, flashlight, and graph paper!
Third Grade
Physics
In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!
Third Grade
Easy
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
This biodiversity project examines the biodiversity in your own backyard.
Third Grade
Medium
Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.
Third Grade
Psychology and Sociology
Marshmallows are made of sugar, water, and air pockets.  Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?
Third Grade
Elementary School
In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.
Third Grade
Fourth Grade
The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.
Third Grade
Elementary School
Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.
Third Grade
Ecology
Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.
Third Grade
Chemistry

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