Water, when heated, is turned into steam.
Mention some gas.
The air we breathe is a gas.
How does heat affect the air?
Heat warms the air and causes it to expand.
Do solids all expand equally when heated?
No; some solids expand more than others; thus, zinc expands more than iron, and iron more than glass.
Do liquids all expand equally when heated?
No; liquids, although more sensitive to heat, do not expand as equally as solids.
Do gases expand equally when heated?