If one of these three factors is missing, fire cannot exist. Fire fighters extinguish fires by removing one or more of the sides of the triangle. Burning releases chemical energy, resulting in increased molecular motion and emission of electromagnetic waves. This increased molecular motion is detected as a rise in temperature. The energy is removed as heat by conduction, convection, and radiation.
Conduction is the transport of heat through solids by direct contact.
This transfer goes from molecule to molecule down the chain, like a row of dominos. You feel the effect of conduction whenever you touch a hot object. Convection is the transfer of heat in fluids. The process begins by heating a fluid. As the fluid warms, it becomes less dense and rises.