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In this activity and/or demonstration, learners illustrate visually and physically that air has weight. Learners balance two equally-inflated balloons hanging from string on a yard stick.

1 cent - $1 per group Ages 8 - 18 5 to 10 minutes
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The demonstration/experiment provides quick proof that air has mass.

$1 - $5 per group Ages 8 - 14 5 to 10 minutes
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This demonstration/activity helps learners understand why higher elevations are not always warm simply because "hot air rises." Learners use a tire pump to increase the pressure and temperature inside

$1 - $5 per group Ages 8 - 18 10 to 30 minutes
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In this activity, learners create a model of a hot air balloon using tissue paper and a hairdryer. Educators can use this activity to introduce learners to density and its role in why things float.

$5 - $10 per group Ages 6 - 14 1 to 2 hours
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In this activity, learners will build an air cannon out of simple materials you can find around the house. Although air is invisible to the eye, it is not by any means empty space!

1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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Learners develop an understanding of air pressure in two different activities.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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Learners color and cut out a spiral-shaped snake. When they hang their snake over a radiator, the snake spins.

free Ages 8 - 14 10 to 30 minutes
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In this activity, learners use cheap, thin plastic garbage bags to quickly build a solar hot air balloon. In doing so, learners will explore why hot air rises.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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In this kinesthetic activity that demonstrates pressure, learners act as air molecules in a "container" as defined by a rope.

free Ages 8 - 14 10 to 30 minutes
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In this quick and easy activity and/or demonstration, learners use two empty soda cans to illustrate Bernoulli's principle.

free Ages 6 - 18 5 to 10 minutes
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In this quick and easy activity and/or demonstration, learners illustrate the effect of the weight of air over our heads.

free Ages 6 - 18 Under 5 minutes
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In this activity, learners explore moving air and the physics of lift and drag by constructing homemade wind tunnels.

$10 - $20 per group Ages 6 - 11 1 to 2 hours
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In this activity, learners calculate the percentage of oxygen in the atmosphere by using steel wool's ability to rust.

1 cent - $1 per student Ages 11 - 18 1 to 7 days
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In this activity, learners build a hot air balloon using just a few sheets of tissue paper and a hair dryer.

$1 - $5 per student Ages 6 - 18 30 to 45 minutes
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In this online Flash game, learners take to the skies in a hot air balloon and are challenged to beat other balloonists' times to the finish line without crashing.

free Ages 6 - 14 5 to 10 minutes
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In this activity, learners build rockets and shoot them into the air by stomping on the plastic bottle launchers.

$5 - $10 per student Ages 6 - 14 30 to 45 minutes
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In this activity about gravity (page 6 of the PDF), learners will come to understand how all objects will fall at the same rate, but that air will slow things down.

1 cent - $1 per student Ages 4 - 8 5 to 10 minutes
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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.

free Ages 6 - 18 5 to 10 minutes
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In this physics demonstration, learners will be surprised when a handkerchief holds water in an upside-down glass.

free Ages 4 - adult Under 5 minutes
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In this activity, learners use simple items to construct a device for indicating air pressure changes.

$1 - $5 per student Ages 8 - 18 1 to 4 weeks