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In this activity, learners test to see if carbon dioxide is present in the air we breathe in and out by using a detector made from red cabbage.

In this activity, learners will experiment with water- and air-filled balloons as a way of dampening sound before it reaches their ears.

In this activity, learners (at least three) work together to explore the effects of atmospheric pressure.

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

This lesson (on pages 15-24 of PDF) explores how sound is caused by vibrating objects. It explains that we hear by feeling vibrations passing through the air.

Most of the time, we don't have to think about breathing. In fact, you're probably breathing right now without thinking about it!

In this activity, learners will construct an air cannon as a model for the human ear.

In this activity, learners trap a thin layer of air between two pieces of Plexiglas to produce rainbow-colored interference patterns.