Question

Difference between expansion and contraction.

Answer 1

The difference between expansion and contraction are as follows:

Expansion	Contraction
1.It is an increase in the size of an a object on heating.	1.It is a decrease in the size of the object on cooling.
2. The particles of matter start moving apart with a gain of energy.	2. The particles of matter start moving closer with the loss of energy.
3. This causes an increase in the volume of the matter.	3. This causes a decrease in the volume of the matter.
4. It leads to a decrease in density.	4. It leads to an increase in density.
5. Expansion is maximum for gases and least for solids.	5. Contraction is maximum in gases and least in solids.