Unit 4: Changing Populations Flashcards
Immigrant
A person who moves from one country from another country
Emigrant
A person who leaves one country to move to another country
Demography
The study of human populations
Birth rate
The number of births in a population per year per 1000 people
Death rate
The number of deaths in a population per year per 1000 people
Natural increase rate
The birth rate minus the death rate
Net migration rate
The immigration rate minus the emigration rate
Population growth rate
The natural increase rate plus the net migration rate.
Doubling time
The length of time for a country’s population to double at a particular population growth rate
Population pyramids
A graph that shows the distribution of ages across a population divided down the center between male and female members of the population
Wide base (interpreting pop pyramids)
A wide base suggests a high birth rate
Narrowing base
A narrowing base suggests a falling birth rate
Sloping sides
Sloping sides indicate a high death rate as people get older
Straight (near vertical sides)
Shows a low death rate as people get older
Bulge in the pyramid
Indicates an increase in the population for a particular period of time. Ex. Increase in births and immigration