Human Populations

Demography

The study of populations

Age structure

The distribution of ages in a specific population at a certain time

Surviorship

Is the percentage of members of a group that are likely to survive to any given age

fertility rate

the average number of children a woman gives birth to in her lifetime

migration

the movement of individuals from one area to another is migration

Life expectancy

the average number of years members of a population are likely to live

Demographic transition

is a model that describes how economic and social changes affect population

infastructure

is the basic facilities and services that support a community, such as public water suppliessewer lines and powerplants

arable land

is the land can be used to grow crobs

urbanization

The movement of people from rural areas to cities

least developed countries

Have increasing death rates while birth remain high