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4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

This science fair project idea investigates whether plants can survive being frozen.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

Construct and experiment with a periscope using reflected light rays to gather an image.

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

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.

Children combine an acid and an alkaline substance to simulate a volcano eruption in this fun experiment.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

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