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What is 1 + 3?
made from living matter millions of years old
anything capable of producing energy and can be used over and over again. ex sunlight and wind power.
non renewable energy
when you use up this kind of energy, it's gone for good
heating petroleum separate the parts, like gasoline and asphalt
the percentage of energy that is actually used to perform work
energy obtained from nuclear reactions
the splitting of uranium atoms
relating to or associated with heat