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

In this physics demonstration, learners will be surprised when a handkerchief holds water in an upside-down glass.

In this demonstration, learners observe the effects of density and pressure. A "diver" constructed out of a piece of straw and Blu-Tack will bob inside a bottle filled with water.

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 activity, learners build their own rockets from paper, coffee stirrers, and tape. Learners discover that when anything flies, air pressure is always involved.

In this activity, learners build a hovercraft using a paper plate, cup, and simple motor.

In this activity, learners create their own obstacle course based on Bernoulli's Principle and try to get a floating ball from the start of their course to the finish line.

Conduct a simple experiment to explore how temperature changes can make things expand or contract.

In this activity, learners build rockets and shoot them into the air by stomping on the plastic bottle launchers.

In this meteorology activity, learners build weather vanes using straws, paperclips, and cardstock.

In this activity, learners explore force and motion by constructing cardboard cars that are propelled by balloons.

In this quick and easy activity and/or demonstration, learners illustrate the effect of the weight of air over our heads.

In this quick and easy activity and/or demonstration, learners use two empty soda cans to illustrate Bernoulli's principle.

In this activity, learners build handheld rockets and launchers out of PVC pipes and plastic bottles. Use this activity to demonstrate acceleration, air pressure, and Newton's Laws of Motion.

In this meteorology activity, learners construct simple devices to measure the direction and speed of wind.

In this activity, learners will create a model rocket out of an inflated balloon attached to a straw on a taught string.

"Molecules in Motion" explores how materials behave and change in a vacuum.

In this activity, learners construct paper airplanes that twist and turn.

In this activity, learners explore gravity and air pressure as they experiment with holding a glass full of water upside down, without spilling it, using a simple piece of cardstock.

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