Population

Population

the total number of people living in an area at a period of time

what is population affected by

migration, birth rate and death rate

birth rate

the total number of births per 1000 per year

death rate

total number of deaths per 1000 people per year

migration

the movement of people from one place to another

MEDC birth rate

low

LEDC birth rate

high

factors causing high birth rates

early marriage, high infant mortality, low status/position in society, lack of sex ed, no contraceptives

factors causing low birth rates

late marriage, low infant mortality, high status/position, knowledge of sex ed, adequate contraceptives

natural increase

when the birth rate is higher than death

natural decrease

when the death rate is higher than birth rate

natural increase is calculated

birth rate minus death rate

dtm

demographic transition model

what is dtm

a model which describes how populations change over time as they develop

population structure

the composition of a countries population

resource

anything that is valuable to man and used in the product of goods/services

overpopulation

where there are too many people living in an area relative to natural resources

what can overpopulation lead to

food shortage, high crime, unemployment, insufficient water/energy

examples of overpopulated countries

china, Singapore, monaco

underpopulation

when people are too little

result of underpopulation

high maintenance

examples of underpopulation

greenland, Mongolia, australia

optinum population

a country with a balance of population size and resources available

why is it difficult to reach optinum population

migration, population changes, tech, exploitation of resources

stage 1

high birth rate, low life expectancy, high death rate

stage 2

birth rate still high, death rate decreasing, higher life expectancy

stage 3

falling birth rate, low death rate, higher life expectancy

stage 4

low birth rate, low death rate, high life expectancy

stage 5

low death rate, birth rate is low, very high life expectancy