(a)[3]
Insert the appropriate label for each change. The first one has been completed for you.
(b)[2]
Describe what happens to the gas molecules as the temperature rises.
(c)[1]
As the metal bar is heated, it expands. Identify which dimensions become larger when the bar is heated. Tick ($\checkmark$) every box that applies.
(d)[2]
State one use and one disadvantage of the expansion of materials when they are heated.