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27 Cards in this Set
- Front
- Back
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most of the energy that we use every day orginally came from the ? |
sun |
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a small amount of energy that reaches Earth's surface comes from ? |
Inside of the Earth |
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? produce most of the energy people use in their daily lives |
electric energy |
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the three main sources of energy used in electric power plants are ? |
coal, nuclear energy in uranium, and hydroelectric power from falling water |
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energy source that is used much faster than it is replaced or is available in limited amounts |
nonrenewable energy resolve |
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the remains of ancient organisms that can be burned as an energy source |
fossil fuels |
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fossil fuels take _______ years to form |
millions |
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__________ and natural gas form from microscopic marine organisms whose remains are subject to increasing temperature and pressure for million of years |
Petroleum |
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_______ forms on land from remains of ancient plants that come under strong pressure |
coal |
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most of the ___________ burned int he US is used to generate electricity in power plants |
coal |
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most of the ________ burned in the US is used to heat building |
natural gas |
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burning natural gas produces less _______ than burning fossil fuels |
pollution |
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burning fossil fuels releases substances that can mix with water in the atmosphere and form _________ which can damage the enviornment |
carbon dioxide |
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burning fossil fuels releases carbon dioxide which cause ___________ a rise in the Earths average temperature |
global warming |
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people can transform nuclear energy from uranium _____ into thermal energy |
nuclei |
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uranium is a _________ energy resource because it is no longer being formed inside the earth |
nonrenewable |
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nuclear power plants do not release __________ into the air |
pollutants |
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nuclear power plants produce wastes that are ____________ and can cause great damage to living things |
radiactive |
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an energy resource that is replaced as fast or faster than it is used |
renewable energy |
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_______ power plant the kinetic energy from falling water is converted into electrical energy |
hydroelectric |
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________ is a radiant energy from the Sun |
solar energy |
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an energy that can be used up |
inexhaustible energy resource |
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thermal energy produced inside earth is called __________ |
Geothermal Energy |
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materials from plants and animals that people burn are called _________- |
biomass |
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in the US, the most common biofuel used in cars is ___________ |
gasoline |
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about 86 percent of the energy used in the US comes form ___________ a nonrenewable energy resource |
fossil fuels |
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_______ energy is one way to make our natural resources last longer |
conserving |
