Lesson 9 Lesson 9. Air and sound. The atmosphere protects us from the heat of the sun during the day and keeps us from getting too cold at night.
Air has atoms and molecules.
Since it is something, it can be pushed. We can push the air around to make wind. Since the moon has no atmosphere, it has no air and no wind. When we hit something and let go, it bounces back. Try a partially inflated balloon.