Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

Turn an abstract lesson into a practical craft with the fun and colorful creation of dough earth layers!

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

This science fair project idea provides evidence that air is everywhere and takes up space.

Learn about lateral earthquake motion and its effect on high rise buildings in this simple 4th grade earth science experiment.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

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 fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

In this activity, children will let their imagination run wild as they design and build a new planet in the solar system.

This science fair project idea investigates how magnetism can defy the force of gravity.

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

Your kid will delight in creating an extraterrestrial vehicle from goods found around the house. There's no telling where her imagination will go!

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

How do organic materials become soil? This science experiment measures what materials biodegrade.

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

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

In this design challenge, your child will make a bottle rocket using typical household items.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.