ch 3 Flashcards
age sex pyramid
a representation of the population based on its composition according to age and sex
baby boom
increased number of births in the two decades following WW2
census
count of number of people in a country, region or city
cohort
a group of individuals who share a common temporal demographic experience
crude birth rate
the ratio of the number of live births in a single year for every thousand people in the population
crude density
total number of people/the total land area
demographic transition
model of population change in which high birth and death rates are replaced by low birth and death rates
depedency ratio
measure of the economic impact of the young and old on the more economically productive members of the population
emigration
a movement in which a person leaves a country
fertility
childbearing performance of individuals, couples, groups or populations
forced migration
movement by an individual against their own will
immigration
a movement in which a person arrives in another country
infant mortality rate
annual # of deaths of infants under 1 year of age compared with the total number of live births for that same year
life expectancy
avg number of years a newborn infant can expect to live
middle cohort
members of the population 15-64 years of age who are considered economically active and productive
natural decrease
deficit of births relative to deaths
natural increase
surplus of births over deaths
old-age cohort
memebrs of the pop 65 and older who are considered beyond their economically active and productive years
population policy
official govt strategy designed to affect any or all of several objectives, including the size, composition and distribution of the pop
pull factors
forces of attraction that influence migrants to move to a particular location
push factors
events and conditions that impel an individual to move away from a location
refugees
individuals who cross national boundaries to seek safety and asylum
replacement rrate
2.1 baby in every 1 woman
total fertility rate (TFR)
avg number of children a woman will have throughout the years that demographers have identified as her childbearing years approx age 15-49
