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25 Cards in this Set
- Front
- Back
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natural resources |
Anything naturally occurring in the environment that humans use. |
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nonpoint source |
A widely spread source of pollution that is difficult to link to a specific point of origin. |
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pollution |
Contamination of Earth's land, water, and air. |
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point source |
A specific source of pollution that can be identified. |
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environmental science |
The study of natural process that occurs in the environment.And how humans affect them. |
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renewable resource |
A resource that is either always available or is naturally replaced in a relatively short time. |
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nonrenewable resource |
A natural resource that is not replaced in a useful time frame. |
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sustainable use |
The use of a resource in ways that maintain the resource at a certain quality for a certain period of time. |
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ecological footprint |
The amount of land and water that individuals use to meet their resource needs and to absorb the wastes that they produce. |
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conservation |
The practice of using less of a resource so that it lasts longer. |
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clear-cutting |
The process of cutting down all the trees in one area at once. |
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selective cutting |
The process of cutting down only some tree species in an area. |
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sustainable yield |
An amount of renewable resource that can be harvested regularly without reducing future supply. |
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fishery |
An area with a large population of valuable ocean organisms. |
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aquaculture |
The practice of raising fish and other water-dwelling organisms for food. |
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biodiversity |
The total number of species on Earth,including those on land,in the water,and in the air. |
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keystone species |
A species that influences the survival of many other species in an ecosystem. |
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gene |
A sequence of DNA that determines a trait and is passed from parents to offspring. |
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extinction |
The disappearance of all the members of a species from Earth. |
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endangered species |
A species in danger of becoming extinct in the near future. |
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threatened species |
A species that could become endangered in the near future. |
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habitat destruction |
The loss of a natural habitat. |
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habitat fragmentation |
The breaking of a habitat into smaller, isolated pieces. |
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poaching |
illegal killing or removal of wildlife from their habitats. |
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captive breeding |
The mating of animals in zoos or wildlife preserves. |
