Heat expands the quicksilver, and causes it to rise in the tube.
How does cold affect the quicksilver?
Cold contracts the quicksilver, and causes it to fall in the tube.
Does heat expand liquids more than solids?
Heat does expand liquids more than solids.
Why are liquids expanded more than solids?
Because the particles of which they are formed are more easily separated or pushed apart by the heat.
If we continue to apply heat to a liquid, what becomes of it?
The liquid is changed into a gas or vapor.
What common example have we of vapor?