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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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What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

Temperature, Air Humidity and Static Electricity

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Best Fertilizer: The Effects of Fertilizer on Plant Growth

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

Thermal Conductivity of Metals: Which Metal Is the Best Conductor of Heat?

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

Does Adding Salt to Pasta make it Cook Faster?

Discover how and which salt melts ice the quickest.

Salt Melting Ice

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

Fastest Way to Cool a Soda

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Changing the Period of a Pendulum

In this CD hovercraft science project, students will construct their own DIY hovercraft.

DIY Hovercraft

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

Bridge Project

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

A Single Movable Pulley and Mechanical Advantage

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Inverted Images

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

Why Do Apples Turn Brown?

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

Making Fake Snot!

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

Magnets and Temperature: Does the Temperature of a Magnet Affect its Strength?

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

A Glass Symphony

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

The Best Stain Remover for Clothes: Testing Laundry Stain Removal

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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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