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Causes of Population Explosion Medical care, sanitation, food production, better nutrition
Emigrants people leaving a country (exit)
Immigrants people coming into a country
Refugees seek safety by going to another country escaping political unrest, war, or persecution
Push factor encourages people to leave a place
Pull factor encourages people to come to or move to a place
Urbanization the process by which population of cities grow
Total fertility rate Average number of children born to a woman in her life
Push/pull factor Economic (most often)
Push/pull factor Cultural/political
Push/pull factor Environmental
Naturalization legal process by which citizens of one country become citizens of another country
Green card a permit allowing a foreign national to live and work permanently in the US.
Urban structure model explains where different types of people live
Sector model explains where cities develop in series of sectors; certain areas are more attractive for various activites
Multiple nuclei model city has more than one center around which activities revolve
Concentric zone model city grows outward from a central ring in a series of rings like tree growth
Population density number of people per square mile
Gentrification renovating deteriorated neighborhoods
Urban sprawl uncontrollable and unplanned expansion of urban areas
Crude birth rate # births per 1000 people
Crude death rate # deaths per 1000 people
Infant mortality rate # infants per 1000 born who die in 1st year of life
Eminent domain power of a government to take private property for public use
Population density formula population/land area
Carrying capacity the point at which there are not enough natural resources to support any more people
zoning prevents mixing of land uses within the same district
Zero population growth stable population while maintaining low death rates
Population trends: India 1/2 of population is under 25 years old, large families, son preference
Population trends: Japan decline in birthrate, parasite singles, few young people
Population trends: China birthrates are decreasing while population ages, son preference
Population trends: Europe steady population; stage 4
Population trends: Sub-Sahara Africa millions dying of aides, large birth rate
Created by: JackieBrawner