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Vocab Test

Across
The practice of reducing energy use
The intense heat energy that comes from earth's interior
A substance that provides energy
Is any material that occurs naturally in the enviorment
A resource that is not replaces within a useful time frame
The percentage of input work that is converted to output work
Fuel made from living things
Down
Is either always available or is naturally replaced in short time
Electricity produced by the kinetic energy of water moving over a waterfall or dam
The process in which two atomic nuclei combine to form a larger nucleus, forming a heavier element and releasing huge amount of energy
Energy fro the sun
Liquid Fossil fuel
Coal, oil,natural gas