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Energy sources

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Across
4
Energy sources derived from the partly decayed bodies of animals and plants are called _______ fuels.
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Energy produced from the sun.
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A type of trash that rots in a landfill and releases a gas that can be converted to a fuel source.
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Wind turbines can convert the energy of the _____ into mechanical energy.
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A solid fossil fuel.
Down
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A fossil fuel that is a mixture of gases beneath earths surface is natural _______.
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When the current supply of _________ resources is exhausted, there will be no replacement supplies available.
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The form of biomass that once provided all the energy needed for heating homes and cooking food.
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A energy source used to provide nuclear power.
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Hydroelectric plants convert energy from falling ______ into electricity for home use.
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A liquid fossil fuel.