Question

metals contract on cooling and expand on heating true or false​

Answer 1

Answer:

Metal expands when heated. Length, surface area and volume will increase with temperature. The scientific term for this is thermal expansion.

Answer 2

The given statement is true - Metals contract on cooling and expand on heating.

Explanation:

• The expansion or contraction of any material is due to the kinetic energy of its own atoms.

• When a material is heated, the increase in energy causes the atoms and molecules to move further and take up more space and eventually expand, and vice-versa during cooling.

• Different metals respond to heat at different extents and this depends on the property of the coefficient of thermal expansion.

• Moreover, all pure metals have positive coefficient thermal expansion.