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Renewable resource

any natural resource (as wood or solar energy) that can be replenished naturally with the passage of time

Non-renewable resource

materials found in nature that CANNOT be renewed or replaced within a reasonable passage of time

Natural resource

any material in nature that people use and value


a substance that can be consumed to produce energy


a process in which a substance reacts with oxygen to give heat and light

Fossil fuel

a nonrenewable energy resource formed from the remains of organisms that lived long ago


an organic compound containing only carbon and hydrogen

Solar energy

energy from the sun that is converted into thermal or electrical energy

Hydroelectric power

electricity generated by flowing water

Biomass fuel

Fuel that derives from plant material and animal waste

Geothermal energy

energy derived from the heat in the interior of the earth

Nuclear fission

the splitting of the nucleus of a large atom into two or more fragments; releases additional neutrons and energy

Nuclear fusion

the combination of the nuclei of small atoms to form a larger nucleus; releases energy

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