Fire is simply the heat and light that comes from burning. Oxygen from the surrounding air will keep the fuel burning. The role of oxygen in burning was discovered in 1771 by French chemist, Antoine Lavoisier. Lavoisier discovered that substances weighed more after they were heated or burned. After a few calculations, he realized that oxygen had combined with the substances while they were burning, making them heavier.
Fire is produced when oxygen unites with substances very rapidly.
Sometimes fires seem to just happen. Oxygen in the air slowly unites with the oil in the rags causing heat to build up. Gotta know what to do If your house catches fire, you can't just run around like crazy. Even if you're alone, you should know how to save yourself from a fire. If the house is burning, alert everyone and get out as fast as you can.