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 science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

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

This science fair project idea explores whether color affects a person's emotional state.

Glass is see-through, but usually you can still see that it is there. In this experiment, we use baby oil to make glass go completely invisible.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

Science fair project which examines the relationship between frequency of spider web vibration and spider's response time.

This science fair project idea measures and compares effects of chemical weathering, specifically carbonation, on different kinds of rocks.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

You've heard the expression "burn rubber" but do you know how heat affects rubber? Examine the impact of temperature on rubber in this fun science experiment.

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

Test your friends to find out if you can replicate the placebo effect's incredible results.

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

This science fair project idea explores alcoholic fermentation at work by making your own soda.

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

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

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

In this project, vinegar and salt act as preservatives keeping bacteria from growing in the bouillon mixtures.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

This science fair project idea's objective is to understand the concept of air pollution and examine the quality of air in our environments.

The project investigates which soft drink is worse for your teeth by observing the affect of soft drink on limestone.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Find out whether putting something on top of a plant will inhibit its growth.