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

In this cool sound resonance experiment, learn about frequency and pitch, and use a tuning fork to calculate sound velocity in air.

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.

Check out this fun science fair project idea for middle school students to learn about the effects of temperature on the density of a gas such as air.

In this cool psychology experiment, study how companies air commercials to strategically advertise to viewers who will buy their products.

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?

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

.Have you ever had problems with your wifi signal strength? In this experiment you will learn about how wireless signals pass through the air and solid objects.

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

This fun middle school science fair project idea helps student discover the concepts behind deep sea diving and how Cartesian divers work.

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 guides you through how to test the humidity in the environment using a homemade psychrometer.

Science fair project that measure winds speed, temperature, and time of day in order to determine the origins of the wind.

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

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 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.

This science project researches the correlation between barometric pressure and wind velocity.

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.

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.

Do heavier objects fall faster than lighter ones? Students learn the answer by watching the effect gravity in a vacuum has on a coin and a feather.

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

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

Science fair project that determines the correlation between wind direction and subsequent weather patterns.