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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 project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.
Fourth Grade
Physical Science
This science fair project idea investigates if fats add to the flavor of food.
Fourth Grade
Chemistry
This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.
Fourth Grade
Physical Science
In this project, waves of vibrations are experimented with using water in glasses.
Fourth Grade
Physics
This science fair project idea  investigates if heat from direct sunlight is hotter than heat from reflected sunlight.
Fourth Grade
Physics
This science fair project idea investigates how color affects temperature.
Fourth Grade
Physical Science
In this project, different brands of microwave popcorn are tested and compared.
Fourth Grade
Chemistry
This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.
Fourth Grade
Physics
This science fair project idea  investigates how optical distances change the apparent size of an object as seen through a magnifying lens.
Fourth Grade
Physical Science
Vitamin C boosts your immune system and your health.  The purpose of this science fair project is to determine which fruit juices have the most Vitamin C.
Fourth Grade
Chemistry
This project tests the hypothesis that dark colors absorb more heat than light colors.
Fourth Grade
Physics
This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.
Fourth Grade
Chemistry
This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.
Fourth Grade
Physical Science

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