Unit 2 APHG vocab test

Arithmetic density

total number of people per unit of land (crude density)

Physiological density

total number of people per unit of arable land

Dependency ratio

number of people in a dependent age group (under 15 or over 65) divided by the number of people in the working-age group (15-64) multiplied by 100

Total fertility rate

average number of children one woman in a given country or region will have during her childbearing years (15-49)

Crude death rate

number of deaths in a given year per 1000 people in a given population

Life expectancy

an average number of years a person is expected to live

Doubling time

number of years in which a population growing at a certain rate will double

Demographic transition model

a model that represents shifts in the growth of a worlds population, based on population trends related to birth rate and death rate

Epidemiological transition model

a model that describes changes in fertility, mortality, life expectancy, and population age distribution, largely as a result of changes in causes of death

Crude birth rate

number of births in a given year per 1000 people in a given population

Population pyramid

graph that shows the age to sex distribution of a population

Pronatalist

describing attitudes or policies that encourage childbearing as a means of spurring population growth

Gravity model

a model that predicts the interaction between two or more places

Forced migration

type of migration in which people are compelled to move by economic, political, environmental, or cultural factors

Step migration

series of smaller moves to get to the ultimate destination

Chain migration

type of migration in which people move to a location because others from their community have previously migrated there

Internally displaced persons

person who has been forced to flee his or her home but remains within the country’s borders

Transhumance

the movement of herds between pastures at cooler, higher elevations during the summer months and lower elevations during the winter

Remittances

money earned by an emigrant abroad and sent back to his or her home country

Interregional migration

movement from one region of the country to another

Brain drain

the loss of trained or educated people to the lure of work in another-often richer- country

Quota

limit on the number of immigrants allowed into the country