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Crunch Time
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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.

Model Eardrum
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In this activity (last activity on the page), learners make a model of the eardrum (also called the "tympanic membrane") and see how sound travels through the air.
Test Your Lung Power
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In this activity, learners try to blow up a balloon hanging inside of an empty bottle.

Lung Capacity
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This is an activity about lung capacity. Learners will measure their own lung capacity using a homemade spirometer.

Go with the Flow
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In this activity, learners discover how hard their hearts work to pump blood.

Do Sweat It!
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In this activity, learners explore why humans sweat. Learners compare the effects of heat on a balloon filled with air and a balloon filled water.