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15 Cards in this Set

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  • Back
population momentum (demographic momentum)
the tendency for population growth to continue despite string family plannin prorams beco f a relatively high concentration of ppl in childbeariing years.
Population projection
A report of future size, age and sex composition of a population based on assumptions applied to current data.
Population pyramid
A graphic depiction of the age, sex, composition of population. (usually national)
Rate of natural increase
the birth rate minus the death rate, suggestion the annual rate of population growth without considering net mirgration.
The horizontal bending, or leveling, of an exponentail j-curve.
the advocacy of population control programs to preserve and improve general national prosperity and well-being
A curve shaped like the letter J, depicting exponetial or geometric growth 1, 2,4,8, 16...)
thomas r.malthus english economist, demographer, and cleric, who suggested that, unless checked by self-control, war, or natural disaster, population will inevitaly increase faster than will the food supplies needed to sustain it.
Homeostatic plateau
the equilibrum level of population that can be supported adequately by available resources; equivalent to carrying capacity.
The permanently in habited areas of the earth.
doubling time
the time period required for any beginning total, experiencing a compounding growth, to double in size.
dependency ratio
the number of dependents, old or young, that each 100 persons in the productive years must, oon average, support.
the scientific study of population, with particular emphasis upon quantitative aspects.
demographic transition
a model of the effect of economic development on population growth. the first stage involves both high birth and death rates; the second phase displays high birth rates and falling mortality rates and population increases. Phase three shows reduction in population growth as birth rates decline to the level of death rates. The final, fourth , stage implies again a population stable in size but larger in numbers than at the start of the transition cycle.
demographic equation
a mathermatical expression that summarizes the contribution of different demographic processes to the population change of a given area during a specified time period: