Crude oil - A mixture of hydrocarbons, a liquid fossil fuel., Fossil fuel - A combustible chemical make from the fossilized remains of plants or animals., Green house gas - A gas which absorbs heat energy from the sun. Will warm up the atmosphere., Bio-fuel - A combustible chemical made from plants, it is considered sustainable., Bio ethanol - A Bio-fuel made by fermenting plant sugars into alcohol., Long chain hydrocarbons - Chemicals from crude oil which burn with a smoky flame., Short chain hydro carbons - Very flammable chemical, with a low melting point which burns with a smokeless flame., Combustion - Burning, it produces carbon dioxide and water.,

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