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.'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 projects, students will grow out the bacteria that collect on air conditioner filters.
Fourth Grade
Life Science
Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.
Fourth Grade
In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.
Fourth Grade
Life Science
In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.
Fourth Grade
What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.
Fourth Grade
Life Science

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