down 2.
The chemical energy in fossil fuels is released by ____ the fossil fuels.
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down 3.
A type of fossil fuel that is the main source of energy for transportation.
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down 5.
The most powerful type of energy that can be produced by changing nuclei instead of atoms through either fission or fusion.
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down 6.
____ bulbs are more efficient than normal light bulbs.
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down 7.
A type of energy resource that is generated when water turns a turbine through pipes in a dam.
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down 9.
Fossil fuels are formed from the remains of ____ and microorganisms that were buried millions of years ago.
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down 10.
Fossil fuels are ____ resources because they can only be used once.
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down 14.
An electric ____ converts mechanical energy into electrical energy.
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down 16.
Normal light bulbs give off much more ____ than fluorescent light bulbs.
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across 1.
Hydroelectric power plants use falling water to spin these.
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across 4.
Related or derived from living organisms such as plants and animals.
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across 8.
A type of fuel formed from the remains of plants or sea creatures millions of years ago.
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across 11.
A type of energy, such as solar energy or wind energy, that can be used over and over.
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across 12.
The direct conversion from sunlight into electricity can be accomplished by ____ panels.
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across 13.
A type of fossil fuel that mostly consists of methane. (2 words)
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across 15.
Agricultural waste products that can be used as a source of fuel.
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across 17.
A type of energy that can be produced when heat from inside of the earth is used.
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across 18.
____ energy is produced when air moves large turbines that generate electricity.
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across 19.
The ____ energy of water in a dam is increased by raising the level of water behind the dam.
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across 20.
A type of fossil fuel that is in the form of a soft rock and easily burns.
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