Question

What could you do to change the volume of a gas?

Answer 1

There is only one way to change the volume of a sample of gas. You must change the volume of its container. A sample of gas always expands to fill the container it's in.

Answer 2

There are a number of ways you can change the volume of a gas.

Temperature: if you heat the gas it rises causing a change volume because the electrons gain more thermal energy BUT if you cool the gas down it sinks decreasing the molecules (the opposite effect)

Pressure can also change a gases volume. high pressure forces the molecules together creating a solid (along with cold temperatures)

Hope this helps!