The number of people living on the planet. Currently near 8 billion and growing fastest in Less Developed Countries
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Census
A periodic count of the number of people living in an area.
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The Natural Increase Rate (NIR)
Tells us how quickly a population is increasing or decreasing every year. Measured by subtracting CDR from CBR.
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The Crude Birth Rate (CBR)
The number of live births per every 1000 people every year.
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The Crude Death Rate (CDR)
The number of deaths per every 1000 people every year.
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Net Migration Rate (NMR)
The number of people coming into or leaving the country every year. Measured by scratching the number of emigrants from the number of immigrants.
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The Population Growth Rate
Explains how fast a given population grows. Measured using this formula: (CBR
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Population Pyramids
Population data is broken down into different age groups and by gender, then displayed in a pyramid graph.
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Population density
The number of people in a given area (square mile or square kilometer usually).
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Life Expectancy
the average period that a person may expect to live
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Total Fertility Rate (TFR)
the average number of children that a woman will have in her lifetime
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Infant Mortality Rate
The number of babies, out of every 1000 babies born, that die within their first year of life.
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Carrying Capacity
how many people a certain environment (country) can safely support considering resources and services
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Physiological Density
the total population divided by the arable land and agricultural land
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Demographic Transition Model
visuals to categorize different countries based on population indicators
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DTM Stage 1
Hunter
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DTM Stage 2
Agricultural Stage
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DTM Stage 3
Industrial Stage
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DTM Stage 4
Tertiary Stage
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DTM Stage 5
Declining Stage
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Thomas Malthus
An English economist who came up with the theory that the population would rise faster than the food needed to feed itself.
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Positive checks
Anything that raises the crude death rate, such as a famine or war.
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Negative checks
Something that decreases the crude birth rate, such as people deciding to have fewer children.
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Migration
A semi permanent move to a new place
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Immigration
A permanent move to a new country
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Emigration
When someone permanently moves out of a country
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Internal migration
A semi permanent move within a country
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International migration
A semi permanent move from one country to another
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Voluntary Migration
A person decides to relocate because they want to, for example for better job opportunities.
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Forced Migration
A person feels that they have no choice but to relocate because of reasons such as war, persecution or natural disaster.
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Refugees
A person who is forced to move because of war, persecution or natural disasters
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Human trafficking
The illegal trade of human beings, a modern
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Cyclical movement
movement away from home for a short time that is repeated
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Seasonal movement
a type of cyclical movement, on a seasonal basis
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Nomadic movement
moving from one spot to another, in search of food for example
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Periodic movement
movement that takes place for an extended period of time and then does not happen again for a long time
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Time/contract movement
the worker is hired by a company to move and work at a job for a certain amount of time but when the contract is over the migrant goes home
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Military service/deployment
when a person is in the armed services and is assigned to a post overseas
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Push Factors
Anything that causes a person to migrate away from a place.
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Pull Factors
Anything that encourages someone to move to a place.
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Quotas
Limits that determine the amount of people that are allowed to immigrate each year.
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Selective Immigration laws
allow governments to give preference to certain groups of people
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Distance Decay Mode
Analyzes the relationship between how far an immigrant is willing to move and how much interaction they desire with their old location.
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Gravity Model
the closer two locations are to each other the more interaction businesses and people will have with each other.
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Chain Migration
Helps to explain why groups of immigrants tend to travel to the same place. When a person moves to a new place they communicate to friends and relatives back home, encouraging them to move as well.
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