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Chapter 3
Question | Answer |
---|---|
natural resource | anything in the environment that is used by people |
renewable resource | are either available or are naturally replaced in a relatively short time |
nonrenewable resource | natural resources that are not replaced in a useful time frame |
pollution | the contamination of earth's land or air |
environmental science | the natural process in the environment and how humans effect them |
clear cutting | the process of cutting down all the trees in an area at once |
Selective cutting | cutting down only some trees in a forest and leaving a mix of tree sizes and species |
Sustainable Yield | the amount of a renewable resource, such as trees that can be harvested regularly without reducing future supply |
fishery | an area with a large population of valuable ocean organisms |
aquaculture | the practice of raising fish and other water-dwelling organisms for food |
Genes | structures in organisms cells that carry its hereditary information |
extinction | the disappearance of all members in a species |
endangered species | species in danger of becoming extinct |
threatened species | species that could become endangered in the near future |
habitat destruction | the loss of a natural habitat |
habitat fragmentation | breaking larger habitats into smaller, isolated pieces |
poaching | the illegal killing or removal of wildlife from their habitats |
captive breeding | the mating of animals in zoos or wildlife preserves |
keystone species | a species that influences the survival of many other species |
biodiversity | the number of different species in an area |
taxol | the substance that protects the Pacific Yew Tree |