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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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Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.
Third Grade
Zoology
Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.
Third Grade
Life Science
This science fair project idea explores the egg's thin membrane.
Third Grade
Life Science
This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.
Third Grade
Life Science
There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.
Third Grade
Life Science
While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!
Third Grade
Microbiology
This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.
Third Grade
Botany
The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.
Third Grade
Microbiology
This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.
Third Grade
Zoology
The project determines which type of birds prefer which type of birdseed.
Third Grade
Zoology
The project investigates the affect music has on plant growth while experimenting with rock, classical and no music.
Third Grade
Botany

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