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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.

Scientists use enormous wind tunnels to test the design of planes, helicopters, even the Space Shuttle.

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

Learners cut and fold a paper helicopter from the template in this PDF. They practice twirling the helicopter and observe what happens as they modify their tries.