A substance that releases energy when it burns., fuel, carbon, The burning of a fuel to produce heat and light., combustion , outcome, A device that contains a wheel with blades that rotate by the pressure of moving water, steam, or air., Turbine , generator, A device that changes the energy of motion into electrical energy., generator , device, A device that stores chemical energy that can change into electrical energy., Battery, coal, Objects made for a specific purpose., device , available, First or most important., primary, turbine , A substance formed from the remains of dead organisms over millions of years, used as a source of energy., fossil fuel, petroleum , A liquid fossil fuel that can be burned to produce energy., petroleum , battery, A solid fossil fuel that is burned to produce energy., coal , uranium, A fossil fuel gas, that is burned for energy., natural gas , nuclear fuel, An energy source made from unstable elements, such as uranium., nuclear fuel , hydropower , An unstable element used by humans as an energy source., uranium , outcome , The results of an event., outcome , available, Energy generated from the movement of water, Hydropower, Device, Energy is produced from heat beneath the Earth’s crust., Geothermal energy:, Hydropower, Something that can be used or obtained., Available , coal .

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