Updated 1 January 2020
Fire is the visible result of the chemical reaction called combustion. Fire is a great example of a chemical reaction that involves the movement of electrons from one substance to another, a process called oxidation. In order to continue burning, fire needs both oxygen (O) and a fuel source (such as wood), and it results in the creation of many new products, including carbon dioxide (CO2) and water (H2O). Fire emits great amounts of heat and light, and while it has many uses, fire can easily spread, becoming extremely dangerous.