Sources of Energy

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What are fossil fuels?

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Fossil fuels are natural substances formed from the remains of ancient plants and animals, primarily consisting of coal, oil, and natural gas. They are non-renewable energy sources.

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What percentage of the total energy used in the United States in 2009 came from fossil fuels?

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83%.

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What is a renewable energy source?

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A renewable energy source is one that can be replenished naturally over time, such as solar, wind, and hydroelectric energy.

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What is a non-renewable energy source?

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A non-renewable energy source is one that cannot be replenished in a short period of time, such as fossil fuels and nuclear energy.

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What is the primary environmental concern associated with burning fossil fuels?

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Burning fossil fuels releases greenhouse gases that lead to global warming.

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What is nuclear energy?

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Nuclear energy is the energy released during nuclear fission or fusion, used as a non-renewable energy source.

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How long does it take for fossil fuels to form?

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Fossil fuels take millions of years to form.

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What is biomass energy?

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Biomass energy is derived from organic materials, such as plants and animal waste, and is considered a renewable energy source.

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What is hydroelectric energy?

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Hydroelectric energy is generated by harnessing the power of flowing water, typically from rivers or dams, and is a renewable energy source.

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What is geothermal energy?

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Geothermal energy is heat energy generated and stored in the Earth, used as a renewable energy source.

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