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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 experiment tests if dog saliva can really help heal wounds.
Fourth Grade
Microbiology
This science fair project idea determines which method of hand cleansing is the most effective.
Fourth Grade
Life Science
Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!
Fourth Grade
Botany
This science project teaches students to classify different shapes of leaves.
Fourth Grade
Botany
How do fish breathe? How do gills work? In this science project, learn about aquatic respiration and find a fish's breathing rate in different temperatures.
Fourth Grade
Zoology
Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.
Fourth Grade
Botany
Fourth Grade
Botany
In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.
Fourth Grade
Life Science

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