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Slide 1

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Population…read more

Slide 2

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Population distribution Factors
Natural recourses
Climate- within human comfort zone for high density,
extremes low.
Eco system e.g. Amazon rain forest
Relief Less in the Himalayas
Migration/ urbanization
Trade, colonization ( coast)
Economic, industry…read more

Slide 3

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Demographic transition…read more

Slide 4

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Kenya case study
Kenya is typical of an LEDC in stage 3 of the demographic transition model
(3.5). Natural increase is high in Kenya because:
Kenya is a mainly rural society so many people need to have children
to work on there land to provide both food and money.
Parents are encouraged to have more children because the infant
mortality rate is so high. 64 per 1000 compared to the uks 8 per 1000.
Over 50% of the population are under 15. Kenyan tend girls marry
younger and therefore have a longer time to have children.
Many Kenyan women have limited access to education and don't have
independent choice in how money children they want to have.
The cost of contraception is high especially in rural areas.
Life expectancy is increasing owing to improved health care safer
water supplies and improved nutrition.…read more

Slide 5

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Population structure
The population structure of a country is the
proportion of people of different ages and genders.
A population pyramids the classic way in which the
population structure is displayed graphically. The
shape can tell us about the level of development of
a country and can be related to the four stages of
the demographic transition model.
The demographic transition model illustrates the
change in population over time. In contrast a
population pyramid is used to illustrate the
population structure at any point in time…read more

Slide 6

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Population pyramids
For every Stage on the demographic transition model there a corresponding
population pyramid.
For stage one - with both high birth and death rates the base of the pyramid is
Very wide getting gradually but substantially thinner due to the high death rates,
both sides of the pyramid are very concave.
For stage two - The death rate decreases while the birth rate stays constant
leading to the population getting older. This means that the base is still wide but
the higher portion of the Pyramid is getting gradually wider in the centre.
For stage three - The decrease in the birth rate leads to the graph thinning at the
base because this means the graph is still wider at the bottom than the top but
not by much the graph is looking more uniform.
For stage four ­ with both the low birth and death rates the population grows
slowly meaning that the graph is becomes higher and also more uniform in shape.…read more

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