Notes on explaining population for GCSE Geography.

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Population Density
Population density is the average amount of people per square kilometre. The formula for working
out the population density is:
Population density = total population divided by total land area in km2
Birth rate
The average number of births per 1000 people per year
Death rate
The average number of deaths per 1000 people per year
Infant mortality rate
The average number of people under the age of 1 who die every year
Life expectancy
The number of years a person is expected to live
Natural Increase
When the birth rate is higher than the death rate, so the population rises
Natural decrease
When the death rate is higher than the birth rate, so the population decreases
When people move from one place to another
When people from another country move into a country
Youthful population
When the majority of the population is under working age. This means that there is likely to be a huge
working population in the future.

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Ageing population
This means that the majority of the population is over working age and retired. This means that they
are not economically active, and that they depend on people to fund them. Unlike a youthful
population, they will never become economically active, and are a drain on the economy
Population Pyramid
A population pyramid shows the percentage of the population that is of an age group, and what sex
they are.…read more


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