Population change

Topic 3

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There are loads of terms and definitions to learn

1) Birth rate- number of live births, per thousand per year.

2) Death rate- number of deaths, per thousand per year.

3) Fertility rate- the average number of children a women will have between the ages of 15 and 44.

4) Infant mortality rate- the number of children (out of every 1000 born alive) who die before their first birthday.

5) Life expectancy- the average age (in years) a person can expect to live.

6) Migration rate- the difference between the number of people who migrate in (immigrants), and the number of people who migrate out (emigrants) per 100 000 (or 1000) of the population, per year.

7) Population density- the number of people per square km squared. It's the total population of an area divided by the size of the area (in km squared).

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As countries develop they move through the stages

Stage 1-

Birth rate and death rate fluctuate at a high level- the population remains stable but low. There aren't any countries in stage 1, but some tribes in the rainforests of Brazil are in this stage.

1) Birth rate is high because there's no birth control or family planning, and education is poor.

2) It's also high because there's high infant mortality, so people have more children to replace those who've died.

3) Death rate is high and life expectancy is low because there's poor health care, sanitation and diet leading to disease and starvation.

Birth rate- around 35/1000

Death rate- around 35/1000

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Stage 2 DTM

Stage 2- high birth rate, death rate falls

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