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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 experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.
Fourth Grade
Elementary School
This project tests the hypothesis that dark colors absorb more heat than light colors.
Fourth Grade
Elementary School
Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.
Fourth Grade
Fifth Grade
Test marble and limestone to determine if acid rain is harmful enough to damage buildings and stone monuments.
Fourth Grade
Fifth Grade
Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.
Fourth Grade
Fifth Grade
Construct and experiment with a periscope using reflected light rays to gather an image.
Fourth Grade
Fifth Grade
In this science project, the center of gravity is explored.
Fourth Grade
Elementary School
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
Elementary School
The purpose of this science fair project is to investigate the reliability of eye witness reports.
Fourth Grade
Elementary School
Discover which type of magnet is the strongest.
Fourth Grade
Elementary School
The purpose of this science fair project is to determine how accurate and precise dart players are.
Fourth Grade
Elementary School
This science fair project idea researches the effects of acid rain on plant growth.
Fourth Grade
Elementary School
What combination of cloth and stain will be the easiest for removing stains? Test and experiment!
Fourth Grade
Elementary School

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