EVERYDAY SCIENCE

Detailed explanation-1: -Substances generally expand on heating and this phenomenon is called thermal expansion. This occurs because of an increase in the kinetic energy of molecules as temperature increases. The force holding the molecules weakens as we increase the temperature, which results in expansion.

Detailed explanation-2: -This tendency is called thermal expansion. When the temperature of a substance is increased, its molecules begin to vibrate more rapidly, which results in a greater average distance between the molecules, which leads to an increase in the volume of the substance.

Detailed explanation-3: -Generally, Substances expand on heating and this phenomenon is known as thermal expansion. This happens because of an increase in the kinetic energy of molecules as temperature increases on heating.

Detailed explanation-4: -Thermal expansion is an increase in material’s volume when its temperature increases. As the temperature increases, the average kinetic energy of the particles increases and they speed up and spread out thereby increasing the volume of the material.