This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

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

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

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.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

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

Demonstrate how to tell the age of an egg without having to crack it open.

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

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.

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.

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

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

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

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

The objective of this science fair project is to study the photosynthesis process and demonstrate the important role that leaves play in the process.

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

This science fair project idea determines if the color of light affects the growth of plants.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

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

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.

This science project allows students to study the psychology of happiness.

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

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.