In science fair projects, middle school students discover why nitrogen fixing bacteria are important to plant growth.

This project concerns activity happening millions of miles away, on the sun.

Find out whether packaged seeds actually do expire in this new science fair project idea.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

First graders are learning to think like scientists. What better place to start, then by raising tadpoles? This hands-on activity explores science in action!

This science fair project examines how carnivorous plants digest insects, and whether the plant can use nitrogen in the soil to compensate for lack of insects.

The purpose of this project is to determine if there are fluctuations in the rising and the setting of the sun and the position of the earth as it rotates.

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

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

This science fair project tested various nose cones to determine which would be the most ideal shape for propelling a water rocket.

In this experiment, you will evaluate whether or not a diet that is supplemented with "brain-enhancing" foods can help improve memory.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Create a habitat for a butterfly right in your own backyard, and build your first grader's science knowledge while you're at it.

The goal of this middle school science fair project is to examine the effect of caffeine on plant growth.

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 outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

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.

A project to reinforce learning about the layers of the rainforest, rain forest ecosystem, and the greenhouse effect.

This science project examines the effectiveness of various types of laundry detergents on stains trapped on a white handkerchief.

Science fair project idea that measures fuel efficiency in cars. Calculate cost per mile by comparing fuel cost and consumption data.

The objective of this science fair project idea is to find out whether refrigerating cosmetics will extend their shelf-life and longevity.

The objective of this free science fair project is to examine the way in which the phases of the moon affect circadian patterns in mammals.

Free science fair project idea that measures change in flexibility with age, using a variety of flexibility tests like Sit & Reach.

This high school science fair project investigates if small changes in your diet alter the pH of your saliva.

Science isn't ho hum anymore when it involves building catapults to teach your fifth grader about projectile motion.

This science fair project idea investigates whether plants can survive being frozen.

Did you ever drink spoiled milk? Find out whether whole milk spoils at the same rate as 2% and skim milk.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.