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Demographer
A scientist who studies the population
Population
A sum of people who live in an area
Population Density
The average number of people living within a square mile or square kilometer
Death Rate
Measure of deaths in a population per 1000 people
Birth Rate
Measure of births in a population per 1000 people
Zero Population Growth (ZPG)
When the number of people in a population doesn’t grow or decline
Infant Mortality Rate
The number of deaths of infants under 1 year old per 1000 live births.
Life expectancy
The average of the number of years a human is expected to live
Fertility Rate
The expected number of children born to a woman over her lifetime
Rural
Sparsely populated
Urban
Densely populated
Subsistence Farming
Farming in which only enough food to feed one’s family is produced
Agriculture
Farming
Literacy
The ability to read and write
Doubling time
The number of years it takes a population to double in size based on its current growth rate
Population distribution
The pattern of where people live
Migration
Movement of people from one place to another
Immigrate
To move permanently to a new country
Refugee
A person who has been forced to leave their country in order to escape war, persecution, or natural disaster
Urbanization
The growth of cities
Megalopolis
A huge cluster of cities with an extremely large population
Emigrate
To leave one’s home to live in another place