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 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.

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

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.

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

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

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

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

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

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

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

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

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 teaches kids experimental design and how to test if subjects can really sense if they are being watched.

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

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

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.

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

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

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

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

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

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

This science fair project idea investigates how color affects temperature.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

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.

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

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