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Learners will build a lung model to understand how their lungs and diaphragm work to make them breathe.

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 about the heart (on page 22 of the PDF), learners examine sheep or chicken hearts to learn about the heart's structure and the flow of blood through the heart.

In this activity, learners try to blow up a balloon hanging inside of an empty bottle.