Terms and Definitions Flashcards
Population density
The number 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 population that relies on the working population for support.
Fertility rate
The average number of babies born to women within a given population.
Age cohort
A measurement of age groups, usually in 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.
Crude Death Rate (CDR)
The number of deaths 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 the CDR in a given population.
Crude Birth Rate (CBR)
The number of live births within a given population in a year - expressed per 1000 population.
Baby Boom
The term given to the rise in birth rates following Rate the end of the Second World War - in Australia refers to babies born between 1946 and 1966.
Replacement Rate
The fertility rate (average 2.1 babies) required for women within a given population in order to maintain the size of that population.
Demographic Transition Model
A method that shows the various stages through which populations may pass.
Age structure
The percentage of people at each age level within a given population.
