Question

What happens to the particles of a gas when there are fewer of them?

Answer 1

Answer: When more gas particles enter a container, there is less space for the particles to spread out, and they become compressed. The particles exert more force on the interior volume of the container. This force is called pressure.

Answer 2

I think it just goes out into the air and the gas gets thinner (if it's not right sorry, this is just what I think happens)