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.

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.

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

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

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

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.

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

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.

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.

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

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

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

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.

In this experiment, the weight of aluminum cans will be compared.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

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

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.