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Energy
Vocab
Question | Answer |
---|---|
the ability to do work | energy |
the energy of motion; depends on speed and mass | kinetic energy |
the energy of position or shape | potential energy |
the total energy of motion and position of an object | mechanical energy |
a change from one form of energy into another | energy conversion |
a force that opposes motion between two surfaces that are touching | friction |
states that energy is neither created nor destroyed | law of conservation of energy |
a natural resource that can be converted by humans into other forms of energy in order to do useful work | energy resource |
a natural resource that cannot be replaced or that can be replaced only over thousands or millions of years | nonrenewable resource |
nonrenewable energy resources that form in the Earth's crust over millions of years from the buried remains of once-living organisms | fossil fuels |
a natural resource that can be used and replaced over a relatively short time | renewable resource |