1.3 population structure Flashcards

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1
Q

What is population structure

A

The composition of a population, the most important elements of which are age and sex

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2
Q

Population pyramid

A

A bar chart arranged vertically, that shows the distribution of a population by age and sex

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3
Q

Dependency ratio

A

The ratio of the number of people under 15 and over 64 years to those 15-64 years of age

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4
Q

How is the structure of a population influenced

A

Mortality
Migration
Fertility

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5
Q

What does a large amount of young people on the population pyramid tell us

A

These young people have to be housed, fed, educated and looked after- this all cost governmental money.

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6
Q

Tip for describing a population pyramid

A

When describing and explaining population pyramids a good starting point is to divide the pyramid into three sections: the young dependant
the elderly dependent
and the economically active

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7
Q

Dependency ratio formula

A

population 0-14 + population aged 65 and over
——————————————————-
population aged 15-64

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8
Q

CASE STUDY: A COUNTRY WITH A HIGH DEPENDENT POPULATION. GAMBIA

A
95% of population are Muslim. 
Until recently religious leader were against the use of contraception. 
due to culture women had little say on family size. 
Children are seen as asset to help farm
dependency ratio is 92 
unemployment is high 
parents struggle to provide housing
desertification
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