Question

Name the kinds of expansion of matter. Define all the kinds briefly.

Answer 1

1. The expansion of matter by absorption of heat energy is known as thermal expansion.
2. Thermal expansion can be categorized into three types: 1) Linear expansion 2) Superficial expansion 3) Cubical expansion.
3. Linear expansion: The increase in the length of matter by the absorption of heat energy.
4. For example, a metal rod will increase its length on heating.
5. Superficial expansion: The increase in the area of matter by absorption of heat energy.
6. For example, a metallic disc or sheet will increase its area on heating.
7. Cubical expansion: The increase in the volume of matter by absorption of heat.
8. For example, a metallic ball will increase its volume on heating.