Check out this science project idea to compare organic produce to non-organic produce and how preservatives in food extend the shelf life of goods.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

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

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

This science fair project idea determines what household items are good conductors of electricity.

In this science fair project, students create their own miniature salt flats at home.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

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

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

This project examines whether playing music during class helps students learn or if it distracts students from learning.

This project compares the strength of one, two, and three-ply toilet paper.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Examine the effect of pressure on carbonation in soda.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

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.

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

This science fair project teaches students the differences between fruits and vegetables.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.