Heat, measure of is the term used to describe TEMPERATURE, which is a measure of the average kinetic energy of particles in a substance. TEMPERATURE is measured in degrees Celsius, Fahrenheit, or Kelvin. Heat is a form of energy that is transferred from one object to another due to a difference in TEMPERATURE. Heat can be generated by friction, combustion, or electrical current. Heat is also used to measure the amount of energy released or absorbed during a chemical reaction.