Population Change Flashcards
Exponential growth
Rapid, year on year population growth.
Crude birth rate
The number of live births per 1000 of the population per year
Crude death rate
The number of deaths per 1000 of the population per year
Natural increase
Occurs when birth rate is higher than the death rate
Natural decrease
Occurs when birth rate is lower than the death rate
Annual population change
The birth rate minus the death rate plus or minus migration
‘J shape’ graph
The name given to a graph that shows an exponential rise
‘S shape’ graph
The name given to a graph that shows exponential growth slowing and leveling off
Migration
The movement of people either into or out of an area
Emigration
The movement of people out of an area
Immigration
The movement of people into an area
Demographic transition model
DTM
A graph that shows how countries pass through different stages of population growth over time. The DTM shows changes in birth rate, death rate and natural population.
Population structure
The composition of a country’s population by age and sex
Census
Population data including age, sex and occupation
Population pyramid
A graph that shows the population structure of a country. Horizontal bars are used to show actual numbers of males and females in each five year age group
