THE " FIRE TRIANGLE "
Fire is a very rapid chemical reaction between oxygen and a combustible material, which results in the release of heat,
light, flames, and smoke.
For fire to exist, the following FOUR elements must be present at the same time:
1) Enough oxygen to sustain combustion
2) Enough heat to raise the material to its ignition temperature
3) Some sort of fuel or combustible material
4) The chemical reaction that is fire.