This science fair project idea provides evidence that air is everywhere and takes up space.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

This classic children's game demonstrates how sound travels through air vs. through a solid.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

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

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

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

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

Science fair project that examines condensation and the conditions needed in order for dew to form.

In this CD hovercraft science project, students will construct their own DIY hovercraft.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

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

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

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

This science fair project idea explores substances that cause a bubble to last longer.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.