what is temperature a measurement of
Several temperature scales exist. In America, the Fahrenheit temperature is most commonly used, though the SI unit Centrigrade (or Celsius) is used in most of the rest of the world. The Kelvin scale is used often in physics, and is adjusted so that 0 degrees Kelvin is absolute zero. By Andrew Zimmerman Jones. Definition: Temperature is a measurement of the average kinetic energy of the molecules in an object or system and can be measured with a thermometer or a calorimeter. It is a means of determining the internal energy contained within the system.