Temperature:

The temperature is commonly higher in the summer than in the winter. Temperature is a quantitative expression of the average kinetic energy contained in matter. This is the most well-known definition. In common, for any given substance, higher the temperature, the faster the atoms and molecules dance around.

Temperature can be expressed in a different way. For illustration, to measure the temperatures of far-away planets, stars, and nebulae in outer space, astronomers look at the way they release electromagnetic (EM) energy in the form of infrared, visible light, ultraviolet, and even radio waves and x-rays. By observing the intensity of this radiation as a function of the wavelength, the astronomers come up with a value for the spectral temperature of the far-away matter or object.

Whenever energy is permitted to flow from one substance into another in the form of heat, the temperatures try to make equal. Eventually, when the energy transfer procedure is allowed to continue for a long adequate time, the temperatures of the two objects will become same, unless one of the substances is driven away for illustration, steam boiling off of a kettle of water. The kinetic energy of everything in the whole universe is trying to level off to a state of equilibrium. It won't succeed in your life span or mine or even during the lifetime of the Sun and solar system, though it will keep trying anyway, and slowly it is succeeding. This procedure is known as heat entropy.