Question

Which occurs when air is compressed?

Answer 1

Answer is B. Air temperature rises and air molecules move faster.

Answer 2

The air temperature increases and the air molecules move faster when air is compressed.

Explanation:

Compression means coming close. Air is compressed, so the molecules of the air come closer, and the distance between them decreases. The compression denotes pushing the molecules of air closer to each other.

As the movement of air molecules is random, the collision between the molecules increases. And hence the molecules starts to move faster after bouncing off multiple times, and also generate heat. So, more the collision, higher the heat generated. This causes the temperature of air to increase.