Temperature can be a measure for the heat contained in a body (physics), describe the temperature conditions of a geographical place (meteorology) or describe the body temperature of cold- or warm-blooded living beings (biology). This means that temperature measurement is important in many fields of nature and technology. Nearly all physical and chemical properties of matter depend more or less on temperature.
All solid matter is composed of very small parts, the atoms and the molecules. These are continuously in movement. The higher the temperature, the greater the velocity of the particles. The temperature as a dimension of the kinetic energy of vibrating atoms and molecules can be measured on the basis of several different physical reactions. For instance based on volume or pressure change, surface charge or emission of electro-magnetic radiation. In temperature measurement a scale is used commencing at 0 Kelvin (= the absolute Zero Point, at which all movement of atoms is at standstill and no kinetic energy is released).