“Gas It Right!

123456
Across
  1. 1. Spreading of gas particles through space
  2. 4. Ability of gas to be squeezed into a smaller space
  3. 5. Property of gas to spread out and fill a container
Down
  1. 2. What gas occupies even if it is invisible
  2. 3. Amount of mass per unit volume
  3. 6. Force exerted by gas particles on container walls