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.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

Grow borax crystals and get your child excited about Earth science with this crafty science experiment.

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.

Get your fifth grader involved in some earth science by helping her plan and create her very own rock collection.

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

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.

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 simple experiment serves as an introduction to the greenhouse effect.

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

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.

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

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

Science fair project that determines whether mass and weight are the same or different.

Are you looking for an out-of-this world activity that's both fun and educational? This solar system garland is a great way to introduce your child to astronomy.

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

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.

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

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

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

In this activity, your kid will watch coal turn into crystals right before her very eyes, and learn some science along the way!

Find out which type of sponge holds the most water.

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

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.