This is a measure of the average kinetic energy of a substance.

Temperature

Explanation:

Temperature is a measure of the average kinetic energy of a substance.

The hotness or coldness of a body is a result from molecular activity. Since the molecules take up the energy, therefore the molecules move faster and the temperature of the system increases.

Therefore, the average kinetic energy of the molecules of a substance is directly related to the temperature of that substance. the higher the temperature, the higher the average kinetic energy.