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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 creates a visual model of whatâs happening to  sound waves as a car approaches and then leaves.
Fourth Grade
Fifth Grade
Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.
Fourth Grade
Elementary School
Fourth Grade
Elementary School
Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.
Fourth Grade
Fifth Grade
Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.
Fourth Grade
Life Science
This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.
Fourth Grade
Elementary School
In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.
Fourth Grade
Easy
This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.
Fourth Grade
Elementary School
In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.
Fourth Grade
Third Grade
This science fair project explores how osmotic pressure forces water through the root up into the plant.
Fourth Grade
Elementary School
This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.
Fourth Grade
Elementary School
In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.
Fourth Grade
Earth & Space Science
The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.
Fourth Grade
Elementary School

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