Fire

Fire is a chemical reaction that releases light and heat. Substances combine with oxygen in the air, combusting with a flame and often smoke. Fires require fuel, oxygen and heat to burn. Different types of fuel include coal, oil and wood. Flames are the part of a fire which we can see, they can be different colors, depending on the substance which is burning. A candle flame typically burns at around 1000 degrees Celsius (1800 Fahrenheit). Fire is very dangerous to humans as it can easily burn or blister skin. It is important to take safety precautions when using fire. Fire is also very useful to humans for lighting, heating, cooking and more. Scientists believe that humans began using fire to cook food in a controlled way around 1 million years ago. Forest fires can be extremely destructive and are dangerous to both humans and wildlife. Fires are also an important ecological process that can stimulate growth. Fires can be stopped in 3 different ways: Removing the fuel source by exhausting it or taking it away. Removing the oxygen by smothering the fire. Removing the heat by absorbing it with water. Fire extinguishers are often used to control fires by discharging water, foams, carbon dioxide, dry chemicals or other substances.