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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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Showing 31 to 42 of 42
Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.
Third Grade
Chemistry
These science fair experiments demonstrate the chemistry of rust and the oxidation process.
Third Grade
Chemistry
The objective of this science fair project is to explore the relationship between acidic and basic compounds.
Third Grade
Chemistry
Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.
Third Grade
Chemistry
This science fair experiment idea's objective is to understand the general concept of an acid and a base.
Third Grade
Chemistry
Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can 'crash out' to form crystals when conditions change.
Third Grade
Chemistry
In this project, different brands of microwave popcorn are tested and compared.
Third Grade
Chemistry
What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!
Third Grade
Chemistry
In this project, the affect of acid rain is simulated by the acid, vinegar.
Third Grade
Chemistry
This science fair project idea creates cool new colorful fabric pattern designs and experiments with the mixing of colors.
Third Grade
Chemistry
The project determines which laundry detergent is best for cleaning clothes.
Third Grade
Chemistry

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