Fuel - A substance that provides energy, such as heat, light, motion, or electricity, Fossil fuels - The energy - rich substances formed from remains of dead organisms. The three main ones are coal, oil, and natural gas., Hydrocarbons - Chemical compounds that contain carbon and hydrogen atoms, Petroleum - Another name for Oil, Refinery - A factory where oil is burned and separated into other fuels and products, Petrochemicals - Compounds made from oil, Solar energy - Energy from the sun, Hydropower - Electricity produced by flowing water, Biomass fuels - A group of fuels made from living things, Gasohol - A mix of alcohol and gasoline, Geothermal energy - The intense heat that warms the Earth's surface, Nuclear fission - The splitting of an atom's nucleus into two nuclei, Rector vessel - The part of the nuclear reaction in which fission occurs, Fuel rods - The reactor contains rods of radioactive uranium, Control rods - Are used to slow down the chain reactions, Efficiency - The percentage of energy used to perform work, Insulation - A layer of material that traps air, Energy conservation - Reducing the energy use,
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