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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 examines the role of fat in food, especially in making bread rise and whipping cream.
Fourth Grade
Elementary School
Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.
Fourth Grade
Physics
This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.
Fourth Grade
Third Grade
Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.
Fourth Grade
Easy
This science fair project idea explores substances that cause a bubble to last longer.
Fourth Grade
Third Grade
In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.
Fourth Grade
Elementary School
This project determines what category of person is most likely to be ticklish.
Fourth Grade
Elementary School
The objective of this science fair project idea is to  determine if sound travels best through the air, water or a solid.
Fourth Grade
Elementary School
This science fair project idea produces varying pitches of sound.
Fourth Grade
Elementary School
This project examines the impact of low water on a radish seedling root system. How is growth affected?
Fourth Grade
Elementary School
How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!
Fourth Grade
Physical Science
What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.
Fourth Grade
Physics
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
Microbiology

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