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BIO121-ch7

TermDefinition
demography scientific study of the sum of our individual acts as they affect measurements of the population
vital statistics population statistics like births, deaths, migration
migration movement from one country or region to another for the purpose of establishing a new residence
immigration migration into a country/region
emigration migration out of a country/region
crude birth rate number of live births per 1,000 people
crude death rate number of deaths per 1,000 people
natural rate of increase growth rate
growth rate surplus/deficit of births over deaths in a population in a given time period
zero population growth (ZPG) when births are equal to deaths, growth rate is 0, absolute numbers remain the same (assumes 0 net migrations—immigrants=emigrants)
negative population growth (NPG) deaths outnumber births, decline in absolute numbers
doubling time number of years it will take a population to double, assuming current growth rate reminds constant
rule of 70 70 divided by the current annual growth rate yields the time it will take to double the population, if the growth rate remains constant
fertility actual bearing of offspring
general fertility rate number of live births per 1,000 women of childbearing age per year
age-specific fertility rate number of live births per 1,000 women of a specific age group per year, like girls aged 15-19
total fertility rate (TFR) average number of children a woman will bear during her life, based on the current age-specific fertility rate, assuming that current birth rates remain constant throughout the woman’s lifetime
age distribution number of individuals of each sex and age from birth thru old age
population profile age structure histograph made from census data
population momentum occurs when there R lrg #s of kids living as fertility rates begin 2 drop ea generation after enter childbearing yrs is larger than preceding generation & bears more children overall even if ea set of new parents has fewer kids than parent of prev gen
dependency load number of dependents in the population (under 15, over 65)
actual rate of increase differs from natural rate of increase because it takes into account migration
quality of life standard of living
standard of living quality of life for the majority of ppl in a given population
cultural carrying capacity optimal size that the environment can sustain in perpetuity, with a given level of tech, standard of living and associated patterns of resurrect use
environmental refugees people forced to abandon their homes because the land can no longer support them
population density how closely ppl are grouped
urbanization rise in number and size of cities
life expectancy average number of years a newborn can be expected to live
infant morality rate (IMR) annual number of infants under age one who die per 1,000 live births
childhood mortality rate annual number of kids between 1-5 who die per 1,000 live births
maternal mortality ratio number of women’s deaths due to pregnancy and childbirth complications per 100,000 live births in a given year
Created by: tallzy14