what is a fuel

• fuel

  substance that undergoes combustion with oxygen to produce energy
• most fuels are organic compounds containing carbon, hydrogen and in some cases oxygen
• organic

  derived from living things
• carbohydrate

  food source made up of the elements carbon, hydrogen and oxygen
• normally in order for combustion of fuel to occur, you have to ignite it
• main energy providing foods are carbohydrates
• carbohydrates are fuels as they are broken down in human body to produce glucose, then broken down further by respiration to produce energy
• fuel + oxygen - carbon dioxide + water