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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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Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.
Fourth Grade
Geology
Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!
Fourth Grade
Ecology
In this science fair project, students use the streak test to tell minerals apart from each other.
Fourth Grade
Earth & Space Science
In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.
Fourth Grade
Geology
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
Ecology
Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.
Fourth Grade
Earth & Space Science
In this science fair project, students make their own rain gauge to measure rainfall.
Fourth Grade
Weather and Climate
What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.
Fourth Grade
Earth & Space Science
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
Ecology
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
Ecology
Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.
Fourth Grade
Weather and Climate
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
Environmental Issues
In this fun science fair project, make two different scale models  of our solar system using Astronomical Units and planets' relative size!
Fourth Grade
Astronomy
This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.
Fourth Grade
Earth & Space Science

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