Population Flashcards
Population density
the number of people in a given area. The total population in a
country or region divided by its area (people/km2).
Population distribution
the way people are spread out in an area.
Crude birth rate
the number of births per 1000 people (CBR).
Crude death rate
the number of deaths per 1000 people (CDR).
Natural increase
The difference between the birth rate and death rate. Natural increase will occur if birth rate is higher than death rate. Natural increase = CBR – CDR.
Demographic transition
model to describe how population changes over time due to changes in birth & death rates.
Family planning
where families receive advice about how to control births and access healthcare such as contraception.
Migration
the movement of people into an area.
International migration
when people move from one place to another
Internal migration
movement of people inside a country.
Forced migration
when people are forced to leave an area due to natural disasters, war etc.
Emigration
When people leave an area
Immigration
When people move into an area
Positive net migration
when more people move into an area than leave an area.
Negative net migration
when more people leave an area than move into an area.
Life expectancy
How long people in certain countries are expected to live.
age dependency
percentage of population that depend on economic support (e.g. pension for the elderly, school for the young).
Population pyramids
age & sex structure of a population can be shown in this type of graph, factors control the shape, birth & death rates & migration.
Bangladesh overpopulation case study
High birth rate of 23 per 1000
85% of Bangladesh’s population is muslim and some religious leaders do not encourage the use of contraception which also increases birth rates to be higher
Since many work in agriculture birth rates can be high so that children can help with farmwork.
More people than resources can handle.
Consequences
Many exist on low wages and as a result GDP per capita is very low at around $1700 which isn’t enough for a good standard of living.
40% of the population is unemployed.
Healthcare is poor e.g. infant mortality rate is 5.07%.
Austrailia underpopulation case study
Small population of only 21.7 million and a massive land area. Gives it one of the world’s lowest population densities.
Only a population increase of 1.15% per year.
Experiences high rates of emigration
Consequences
Australia has large reserves of natural resources. Exports earnings of $200 billion annually.
High GDP per capita ($41,300)
99.9% literacy rate (good education services).
An anti-natalist policy case study (China)
Between 1979-2015
Needed as the population went out of control (1960s).
Carrot and stick approach. If you agree you get the carrot which is meant to be a reward and if you don’t agree you get the stick which is a punishment e.g. 10%-25% of annual salary or jobless.
Consequences
300 - 400 million births prevented.
Worked, birth rates fell
90% of the abortions were female as due to traditional preferences for boys.
Eventually the government became settled and people could have as many as they liked (come 2021).
Gambia youthful population case study
A large proportion is under 18.
1 in 10 children die in infancy in Gambia.
Larger families are seen as a sign of security.
Consequences
Lack of sanitation and unhygienic conditions.
Fertility rates of 5.3 children per woman, families lack resources to provide for so many children.
Gambia’s schools are overcrowded. A school in Banjul has 3000 students but only 26 classrooms.
Japan country with low rates of population growth case study.
Fertility rate fallen from 2.1 to 1.36.
One of the lowest birth rates in the world.
Cultural preference for one child
Consequences
Fewer people being added to the population which means less economically active people in the future.
Can impact the economy as less money is being put towards the government.
When birth rates fall very low there may need to be an increase in immigration. Japanese do not favour high rates of immigration and can be difficult for migrants e.g. language.
Botswana HIV/AIDS case study (no seven mark question for Botswana)
35-38% of the population are infected (2nd highest rate of HIV infection in the WORLD).
Only 18% of people in Botswana are married.
Lack of doctors/nurses.
Consequences
Life expectancy has fallen from 65 (1991) to 58 (2011)
⅓ of Botswana’s workforce is infected
Most affected group is working class