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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 fair project idea explores substances that cause a bubble to last longer.
Fourth Grade
Chemistry
How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!
Fourth Grade
Physical Science
This science fair project uses paper chromatography to  investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.
Fourth Grade
Physical Science
The objective of this science fair project idea is to  determine if sound travels best through the air, water or a solid.
Fourth Grade
Physics
This science fair project idea produces varying pitches of sound.
Fourth Grade
Physical Science
This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.
Fourth Grade
Chemistry
This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.
Fourth Grade
Electricity and Magnetism
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
Take a dive into the candy jar with this yummy science experiment.
Fourth Grade
Chemistry
This science fair project idea explores the relationship between oil and water in terms of density as well as hydrophilic/hydrophobic compounds.
Fourth Grade
Chemistry
Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.
Fourth Grade
Chemistry

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