population dynamics Flashcards
population density
the amount of people located within a given area
life expectancy
the average number of years a baby born into a population can expect to live
dependent population
the percentage of very young and very old peoples within a popultion that relies on the working populaion for support
fertility rate
the average number of babies born to women within a given population
age cohort
a measurement of age groups usually five years used in population pyramids
infant mortality rate (IMR)
the number of deaths of babies before the age of one- expressed per 1000 population/year
Crube death rate (CRD)
the number of deahs within a given population in a year-expressed per 1000 population
population growth
the percentage at which a population increases or decreases each year
ageing population
a population in which the proportion of people in the older cohorts is increasing
natural increase
the difference between the CBR and CDR in a given population
crude birth rate (CBR)
the numberof live births within a given population in a year-expressed per 1000 population
baby boom
term given to the rise in birth rates following the end of the second world war- in australia refers to babies biorn between1946-1966
replacment rate
the fertility rate (average 2.1) required for women within a given population in order to maintain the size of that population
demographic transitional model
a method that shows the various stages through whic populations may pass
age structure
the percentage of people at each level within a given population
