the sun is the major source of energy for the earth
TRANSCRIPT
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The sun is the major source of energy for the earth.
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Coal, oil, and natural gas are called fossil fuels because they come from plants and animals that have been buried for millions of years.
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The weight of mud and rock over millions of years created pressure and heat that changed the plants and animals into fossil fuels.
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These energy sources are considered nonrenewable because they are consumed, they are gone for our lifetimes: it will take millions of years to produce more.
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Coal
Have you felt the heat energy released during charcoal-grill cooking? Charcoal is like coal, which is a nonrenewable energy source: once all the coal is used up from the place it was found, no more can be mined there or made.
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Oil
How is the oil lamp an energy source?
Heat and light are produced during the burning process.
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Oil is also refined to produce gasoline.
Oil is a nonrenewable energy source because once all the oil is used up
from the place it was found, no more can be found or made.
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Natural Gas
Natural gas is formed from dead plants and decaying plant and animal life that lived millions of years ago in swampy, warm conditions.
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Natural gas is usually piped to homes and is used to light stoves, heat water, and run furnaces.
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Gas is a nonrenewable energy source because once all the gas is used up from the place it was found, no more can be found there or made.
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Sunlight, moving water, and wind are naturally occurring sources of energy.
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Solar energy is captured directly from the sun by plants to make food.
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Solar energy can also be converted to electricity by solar cells. The force of moving water and moving air (wind) can also be used to generate electricity.
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