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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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The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.
Fourth Grade
Easy
Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!
Fourth Grade
Zoology
This science fair project idea researches the definition of ‘biodegradable’ and explores this in a real-life setting.
Fourth Grade
Elementary School
It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.
Fourth Grade
Environmental Issues
This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.
Fourth Grade
Fifth Grade
This project examines whether people's taste perception is influenced by what they see.
Fourth Grade
Elementary School
Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.
Fourth Grade
Easy

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