Cold Cold is just the absence of heat. Temperature Temperature is an measurement of the amount of heat. In the United States we use the Fahrenheit system to measure temperature. Movement of Heat Heat always moves from hot to cold. Heat can move by conduction, convection and by radiation.
Conduction is the movement of heat from particle to particle.
Conduction takes place most readliy in solids, but also takes place in liquids and gases. An example would be the heat that moves up an iron rod that is held in a fire. Convection is the movement of heat by a moving medium. Convection takes place only in liquids and gases since solids do not flow. The movement of the forced hot air of a furnace is an example of convection.