Unit 2 Ap Human Geo population and migration

Arithmetic density

Total number of people divided by the total land area

Physiological density

Th number of people divided per unit of arable land

Sex Ratio

Ratio of males to females in a population

Dependency Ratio

It compares the working class to the non working class; younger people depend on working class

TFR

Total Fertility Rate

Woman give an average of 2.1 kids

Life Expectancy rate

Rate in most people live

Crude Birth Rate

Total of live humans birth divided by 1,000 people

Population pyramid

Pyramids of a certain population

CDR

Crude Death Rates

Amount of deaths divided by total population

Doubling time

The time it takes fore a population to double

Natural increase Rate NIR or RNI

How quickly a population is declining or increasing

Overpopulation

A number of people that out numbers supplies; people are crowded

Demographic transition Model DTM

1,2,3,4,5

Epidemiological Transition Model ETM

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

Pronatalist

Promotes reproduction of human life

Step migration

Series of multiple moves to get to an ultimate location

Chain Migration

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

Transhumance

International migration in which people still hold onto a strong cultural,emotional,and finances with their countries of origin and

Internally displaced person

IDP

Person who has been forced to flee his or her home but remains within the countries border

Interregional migration

A movement within a countrys borders

Quota

Limit on the number of immigrants allowed into the country

Remittances

Money earned by an emigrant aboard and sent back to his or her country

Brain Drain

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