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Ch.5.1
vocabulary
11
Biology
10th Grade
11/12/2012

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Term
biodiversity
Definition
the variety of life in an area
Term
extinction
Definition
disappearance of a species when the last of its members dies.
Term
threatened species
Definition
when the populationof a species begins declining rapidly
Term
endangered species
Definition
when numbers become so low that extinction is possible
Term
habitat fragmentation
Definition
the separation of wilderness areas from other wilderness areas
Term
edge effect
Definition
the different conditions along the boundaries of an ecosystem
Term
habitat degradation
Definition
the damage to a habitat by pollution
Term
acid precipitation
Definition
rain, snow, sleet, and fog with low pH values
Term
ozone layer
Definition
the part of the atmosphere that acts as a sunscreen to protect living organisms from damaging or lethal doses of ultraviolet radiation
Term
exotic species
Definition
organisms that are not native to a particular area, growing at an exponential rate due to a lack of competition and a lack of predators, replacing niches of native species.
Term
native species
Definition
organisms that are natural to an area
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