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Science chap.3 Vocab

natural resource anything in the environment that is used by humans
renewable resource either always available or naturally replaced in a relatively short time frame
nonrenewable resource Natural resources that are not replaced in a useful time frame
Pollution the contamination of earth's land, water or air
environmental science is the study of natural processes in the environment and how humans can affect them
clear-cutting is the process of cutting down all the trees in one area at once
selective cutting cutting down only some trees in a forest and leaving a mix of tree sizes and species behind
sustainable yeild is an amount of a renewal resource such as trees that can be harvested regularly without replacing the 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
biodiversity the number of different species in an area
keystone species a species that influences the survival of many other species in an ecosystem
gene the structures in an organism cell that carries its hereditary infirmation
extinction the disappearance of all members of a species from the earth.
endangered species species in dander of becoming extinct in the near future
threatened species species that could become endaangered
habitat destruction the loss of a natural habitat
habitat fragmentation breaking larger habitat into smaller habitat
poaching the illegal killing or removal of wildlife from their habitat
captive breeding the mating of animals in zoos or wildlife preserves
taxol the substance that protects the pacific yew tree
Created by: apetosa