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16 Cards in this Set
- Front
- Back
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extinction
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disappearance of an entire species from the face of the earth
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mass extinction
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extinction of large proportion of the world's species in a very short time period due to some extreme and rapid change or catastrophic event
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birth rate
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rate of birth within a population
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death rate
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rate of death within a population
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immigration
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arrival of individuals from outside a population
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emigration
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departure of individuals from a population
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growth rate
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net change in population's size per 1000 individuals
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exponential growth
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increase of a population by a fixed percentage each year
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limiting factors
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physical chemical or biological characteristics of the environment that restrains population growth
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carrying capacity
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maximum population size that a given environment can sustain
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density dependent factors
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limiting factors whose effects on a population increase or decrease depending on the population. density
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density independent factors
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limiting factors whose effects are constant regardless of the population density
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IPAT model
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formula that represents how humans total impact on the environment results from the interaction among 3 factors: population, affluence, and technology
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family planning
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the effort to plan the number and spacing of one's children, so as to offer children and parents the best quality of life possible
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birth control
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the effort to control the number of children one bears particularly by reducing the frequency of pregnancy
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contraception
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deliberate attempt to prevent pregnancy despite sexual intercourse
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