Science fair project which determines whether it is numerically possible to be connected to every person on the earth within six degrees of separation.

Children reflect on ways they have cared for themselves, others, and the Earth before building a garden to share beauty with others in their community.

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.

Your child can use leaves and grass to create his own outdoor art in celebration of Earth Day...all he needs are is the great outdoors and some creativity!

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

Here's an authentic writing task that is perfect for Earth Day, or any day! In this activity, your child's pen becomes an instrument of planetary importance.

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

It's a rare kid who doesn't like a sandbox. Next time you're out digging, build in some earth science, too.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

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.

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

This project uses science and art to help students learn and teach others about Earth's endangered and extinct species.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

This simple experiment serves as an introduction to the greenhouse effect.

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

Help your child keep track of his pledges to be more environmentally friendly with a calendar made entirely out of recycled and reused materials!

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

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

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

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

We all know that the Moon has different phases, but it can be hard to figure out why. Try this activity to see how the Moon's phases really work.

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

Turn leftover puzzle pieces into a one-of-a-kind necklace that's sure to brighten any outfit.

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.