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This simple, yet surprising physics demonstration challenges preconceptions about forces, and demonstrates the strength of atmospheric pressure.

In this demonstration, learners observe the effects of air pressure. They will watch as marshmallows inside a bottle expand as a vacuum pump removes air from the bottle.

In this simple demonstration, learners investigate the properties of air pressure. Learners place an index card on top of a glass full of water, then invert the glass.

In this activity, learners observe what would happen to their bodies if they went to outer space without a space suit.

In this quick and easy activity and/or demonstration, learners use two empty 2-liter bottles and hot tap water to illustrate the effect of heat on pressure.

In this activity, learners use simple items to construct a device for indicating air pressure changes.

In this activity, learners observe the water cycle in action! Water vapor in a tumbler condenses on chilled aluminum foil — producing the liquid form of water familiar to us as rain and dew.

Demonstrate the Bernoulli Principle using simple materials on a small or large scale.

In this activity, learners explore moving air and the physics of lift and drag by constructing homemade wind tunnels.

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

In this activity, learners use simple items to construct a device for indicating air pressure changes.