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9 Cards in this Set
- Front
- Back
materials in the environment that are useful to people |
natural resources |
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fuels made from organic matter |
biofuels |
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the practice of decreasing the use of natural resources in order to save them |
conservation |
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electricity made from the energy of moving water in a dam |
hydroelectric power |
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heat energy naturally produced within Earth |
geothermal energy |
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sources of energy that do not come from fossil fuels |
alternative energy sources |
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natural resources, such as fossil fuels, that will eventually be used up and can never be replaced |
nonrenewable resources |
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natural resources that nature can produce again, such as trees, plants, animals, water, oxygen, and soil |
renewable resources |
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fuels formed from the decaying remains of plants and animals that lived millions of years ago |
fossil fuels |