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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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This science fair project idea researches the definition of ‘biodegradable’ and explores this in a real-life setting.
Fourth Grade
Elementary School
This science fair project idea determines which method of hand cleansing is the most effective.
Fourth Grade
Elementary School
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
Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.
Fourth Grade
Zoology
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
In this science fair project, students make their own rain gauge to measure rainfall.
Fourth Grade
Weather and Climate
This science fair project will help students learn about non-vascular plants, such as mosses.
Fourth Grade
Second Grade
Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!
Fourth Grade
Easy
In this science fair project, students create their own miniature salt flats at home.
Fourth Grade
Fifth Grade

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