9.4 population age structures Flashcards
post-reproductive age
45+
reproductive age
15-44
reproductive age
under 15
super steep age structure
high
less steep age structure
med
not steep at all more straight up and down
low
economic and environmental concerns
immigration, literacy rate, freshwater withdrawals, caloric consumption
growth rate formula
birth-death rate/10
stage 1
steep skinny triangle, high birth&death rate
stage 2
shaped like a triangle, high birth rate, falling rapidly death rate
stage 3
shaped like a rectangle with a triangle on top, falling birth and death rate
stage 4
shaped like a cone, low birth and death rate
stage 5
shaped like a rocket, low birth rate, with little change in death rate
imminent population growth
lots of young people will get older increasing the age
factors of growth rate
birth and death rate
