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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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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
Science Fair Project Ideas
In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.
Fourth Grade
Science Fair Project Ideas
Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.
Fourth Grade
Science Fair Project Ideas
4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.
Fourth Grade
Science Fair Project Ideas
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
Science Fair Project Ideas
What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.
Fourth Grade
Science Fair Project Ideas
How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.
Fourth Grade
Science Fair Project Ideas
Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.
Fourth Grade
Science Fair Project Ideas
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
Science Fair Project Ideas
In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.
Fourth Grade
Science Fair Project Ideas
In this CD hovercraft science project, students will construct their own DIY hovercraft.
Fourth Grade
Science Fair Project Ideas
Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.
Fourth Grade
Science Fair Project Ideas
Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.
Fourth Grade
Science Fair Project Ideas

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