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an energy resource that can't be replaced as fast as we use it. include fossil fuels and nuclear energy.
energy resources that are naturally replaced more quickly than they are used. include solar, hydro, wind, geothermal and biomass energy.
the increase in the size of a substance in response for the increase in temperature.
the amount of heat required to raise the temperature of a substance by 1 degree k or c.
a machine that transforms heat into mechanical energy / work.
internal and external combustion engines are in cars.
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