Question

2. The increase in the size of a matter on heating is called ......​

Answer 1

Answer:

The increase in the size of a matter on heating is called thermal expansion.

Answer 2

Answer:

The increase in the size of a matter on heating is called thermal expansion.

Thermal Expansion

$\bigstar$ Thermal expansion is the increase in size of matter on heating .

$\bigstar$ A body undergoes thermal expansion  when the particles(molecules) undergoes rapid vibratory motion.

$\bigstar$ If a body is heated then the particles(molecules) will absorbed this heat energy  any will start to vibrating vigorously.

$\bigstar$ So the body will tend to make changes in its shape , volume , area etc .

$\bigstar$ This change in shape , volume or area of a body on heating is known as thermal expansion.

♠️ The branch of physics that deals with the study of heat , its forms and relations with other forms of energy  is known Thermodynamics .