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

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.

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

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

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.

Construct and experiment with a periscope using reflected light rays to gather an image.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

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

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

Climates with more snowfall have more coniferous forests and fewer deciduous ? Learn about how pine trees in a coniferous forest adapted to withstand snow.

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

Is it a square or a circle? See if you can trick your friends with this zany science project!

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

Help your child measure breezy weather in her environment by making a wind vane for kids, a simple version of the classic scientific measurement tool.

This science fair project idea discovers which brand of bubblegum produces the largest bubbles.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

An hour glass, also known as a sand clock, keeps time. In this activity, your child will make her own sand clock and measure the time it keeps.

Hone your child's skills of observation and take a look at forensic science for an interesting afternoon of exploration and detective work!

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Find out whether a longer airplane will fly farther or a wider paper airplane.

Believe it or not, images that are cast upon your eye's light-sensitive screen (called the retina) are upside down. Here's a fun, fast experiment to prove it!

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.