The objective of this science project is to determine the relationship between carbon dioxide gas and the temperature of the atmosphere.

This science fair project will help learners determine whether algae can be made to grow by feeding it supplementary carbon dioxide.

This experiment will evaluate bacterial content on toothbrushes before and after different cleaning methods to determine which method of disinfecting is best.

Science fair project in which you will build your own algae photobioreactor which will meet the physiological requirements of algae for maximum growth.

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

Ethanol can be used as an alternative fuel! The purpose of this experiment is to identify a starch plant that produces the largest quantity of ethanol.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

Homemade Halloween treats make great party foods for an All Hallow's Eve get together. These four homemade Halloween treats are scary-good.

The goal of this science fair project is to evaluate the effect of heat on sound wave frequency.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

What direction should solar panels face? It's not the direction you might think! This free and enlightening science fair project helps kids discover the answer.

The purpose of this science project is to investigate which will grow larger plants: compost, soil and Miracle - Gro, a mixture of both.

Help your first grade scientist learn about metamorphosis by observing the life cycle of some interesting creepy crawlies.

Read on this high school science fair project idea to get basic information on the process of heat transfer and the conditions under which the transfer occurs.

Determine whether magic salt is more effective at melting snow than regular salt. Pour one ounce of salt over the ice cubes, compare the melt downs.

How does bleach kill bacteria? Kids find out in this impressive bacteria science fair project by testing different concentrations on a safe strain of E. coli.