oil, natural gas, and coal; formed from the decayed remains of ancient plants and animals
liquid fossil fuel formed from decayed remains of ancient organisms; can be refined into fuels and used make plastics
natural resource, such as fossil fuels, that cannot be replaced by natural processes as quickly as it is used
uses energy from a controlled chain reaction to generate electricity
radioactive by-product that results when radioactive materials are used
energy source that is replaced almost as quickly as it is used
device that converts solar energy into electricity; also called a solar cell
electricity produced by the energy of falling water
thermal energy in hot magma; can be converted by a power plant into electrical energy
renewable organic matter from plants and animals, such as wood and manure, that can be burned to provide heat
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