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

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.

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

This easy at-home experiment is a great way to "see" science.

In this Bernoulli's Principle experiment, you'll learn how an increase in the speed of a fluid, like air, decreases pressure.

Here's a great activity that will bring out the performer in your child!

This spider mobile activity encourages learning about the science of motion, air currents and art.

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

What is condensation? Little mad scientists will learn about condensation, states of matter, and air pressure by conducting this cool science experiment.

Pretty fluttery feather earrings add a light touch to any outfit. Your child will float on air knowing she made the earrings herself.

This experiment that explores water and air pressure will amaze your fifth grader as it appears that a single card is holding water in an upside-down glass.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

The purpose of this science fair project is to build a basic radio.

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?

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

Science fair project which teaches you about the principles of physics within a vacuum by creating a vacuum chamber.

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

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

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

Turn the common pastime of constructing paper airplanes into a lesson on the physics of aerodynamics and flight with this fun science activity.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

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 simple experiment serves as an introduction to the greenhouse effect.

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.

A simple science experiment exploring the physics of water pressure that's been amazing people since Medieval times.

Check out this mind-blowing experiment in which a hard-boiled egg will fit through an impossibly small opening with the help of only a few matches!