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.

Make sourdough bread...and learn some colonial history and modern science in the process!

Kids will discover the meat science behind the meat they eat, and find out how to use safe chemistry to make meat more tender.

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

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

It's food. It's Thanksgiving tradition. And guess what: Cranberry Sauce is also science! Try our simple recipe/experiment.

Does your middle school teenager have good reflexes? Gauge his reaction time in this science and math activity that requires only a yardstick and a friend.

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

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.

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

This experiment that explores water and air pressure will amaze your fifth grader as it appears that a single card is holding water in an upside-down glass.

Teach your child some scientific basics as you explore the densities of various liquids in this fun experiment.

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

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!

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

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

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

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

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

This easy at-home experiment is a great way to "see" science.

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

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

This science fair project idea compares biodiversity between drops of water.

The purpose of this science fair project is to build a basic radio.

This science fair project idea investigates how color affects temperature.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

This science fair project examines how seeds hitchhike on animals and clothing.

This science fair project idea produces varying pitches of sound.