The Human Population

Demography
the study of the characteristics of human populations
Age structure
the distribution of ages in a specific population at a certain time
Survivorship
the percentage of members of a group that are likely to survive to any given age
Fertility rate
the number of babies born each year per 1,000 women in a population
Migration
the movement of individuals from one population into another
life expectancy
the average number of years a person is expected to live
demographic transition
is a model that describes how economic and social changes affect population growth rates.
infrastructure
the basic facilities and services that support a community
arable land
land that can be used to grow crops
urbanization
Movement of people from rural areas to cities
least developed countries
Countries that have been identified by the United Nations as showing the fewest signs of development in terms of income, human resources, and economic diversification.