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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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Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.
Fourth Grade
Physics
In this project, vinegar and salt act as preservatives keeping bacteria from growing in the bouillon mixtures.
Fourth Grade
Chemistry
This science fair project idea examines the reason boats are shaped and engineered.
Fourth Grade
Physics
Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.
Fourth Grade
Chemistry
This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.
Fourth Grade
Chemistry
These science fair experiments demonstrate the chemistry of rust and the oxidation process.
Fourth Grade
Chemistry
Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.
Fourth Grade
Physics
Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.
Fourth Grade
Chemistry
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
This science fair project idea  investigates if heat from direct sunlight is hotter than heat from reflected sunlight.
Fourth Grade
Physics

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