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The demonstration/experiment provides quick proof that air has mass.

Learners measure a bottle full of air, and then use a vacuum pump to remove the air. When they re-weigh the bottle, learners find the mass is about 0.8g less.

In this experiment, learners use a blow dryer and water bottle to observe and record changes in air pressure caused by changes in temperature.

In this activity, learners explore how air warms when it condenses water vapor or makes clouds.

In this activity, learners conduct an experiment by heating an aluminum can filled with water to investigate air pressure.

In this physics activity (page 3 of the PDF), learners will see firsthand that air takes up space and has pressure by attempting to inflate a balloon inside of a bottle.

Learners blow into balloons and collect their breath--carbon dioxide gas (CO2). They then blow the CO2 from the balloon into a solution of acid-base indicator.

In this weather activity which requires adult supervision, learners will get a chance to make a cloud right here on Earth!

In this activity, learners use a flashlight, a glass of water, and some milk to examine why the sky is blue and sunsets are red.

The "Rocket Reactions" activity is an exciting way to learn about how materials interact, behave, and change.

In this demonstration, learners can observe a number of small convection cells generated from a mixture of aluminum powder and silicon oil on a hot plate.

In this simple activity, learners see the production of a gas, which visibly fills up a balloon placed over the neck of a bottle.

In this activity, learners explore clouds and how they form.

In this chemistry demonstration, acid rain is simulated in a petri dish.