The process begins by heating a fluid. As the fluid warms, it becomes less dense and rises. Colder, denser fluid then sinks down and takes the place of the warmer fluid, creating a convection cell . Radiation is the transfer of energy through empty space or transparent materials. The energy travels in waves from the source, such as the energy that travels from the sun to Earth or the heat you feel coming from a stove.
Radiation causes the temperature of materials around a fire to rise.
If the temperature increases, the material may reach its ignition temperature and burst into flames, adding more fuel to the fire. Smoke is the most frequent cause of death, since it displaces the oxygen we breath and fills the air with poisonous toxins. After only a few seconds in a smoke-filled room, you can become disorientated and experience distorted judgment. You should know what to do in the event of a fire. Plan escape routes from your apartment or home and practice using them.