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Fourth Grade Science Fair Project Ideas

Building off of what they learned in 3rd grade, 4th graders add a new level of sophistication to their 4th grade science projects. In addition to describing data quantitatively, kids begin to use their observations to formulate scientific arguments and engage in scientific debate. 4th grade science fair projects may involve kids going beyond testing a hypothesis—young scientists can be encouraged to use their results to make predictions about what might happen when the experiment is expanded to test new variables. Education.com's selection of fourth grade science fair project ideas are carefully written with 4th graders in mind, giving them the tools they need to effectively learn about the world around them by pursuing the answers to their questions in a methodical way.

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In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!
Fourth Grade
Chemistry
Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.
Fourth Grade
Chemistry
In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.
Fourth Grade
Chemistry
Discover how and which salt melts ice the quickest.
Fourth Grade
Chemistry
This science fair idea project identifies the active ingredients in soap and experiments with the properties of soap.
Fourth Grade
Chemistry
This science fair project idea explores the different properties & interactions of sugar molecules.
Fourth Grade
Chemistry
This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.
Fourth Grade
Chemistry
Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.
Fourth Grade
Chemistry
What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!
Fourth Grade
Chemistry
This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.
Fourth Grade
Chemistry

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