We had a visit from a fire safety officer. We found out some interesting facts about fire. He told us about the triangle of fire. Oxygen is the gas which we need to breathe so it is all around us. A fire also needs oxygen to burn. Fuel is something that burns in a fire. This can be anything from paper to furniture in your house. We get heat from matches and lighters. Oxygen, fuel and heat = fire. Many fires start during the night.