Answer
The temperature is a unit of measurement for the average kinetic energy of the particles contained within an object.
Explanation
All substances of mass, according to the kinetic theory of matter, are composed of constituent particles in a physical state that reflects their kinetic energy. Indeed, some generalizations may be taken, such as the fact that when the kinetic energy of the constituents increases, the substance transitions from the solid phase to the liquid phase, then to the gas phase, and finally to the plasma state.