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5 Mark Question. Explain the differences in fertility in two contrasting geographical locations. [5 marks]. 5 mark Q = 7 or 8 minutes = 10 to 12 lines of writing. AIMS: To interpret Population Pyramids (PPs). To know the 4 clear stages in Economic Development shown by PP’s.

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5 Mark Question

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5 mark question

5 Mark Question

Explain the differences in fertility in two contrasting geographical locations. [5 marks]

5 mark Q = 7 or 8 minutes = 10 to 12 lines of writing.


5 mark question

  • AIMS:

    To interpret Population Pyramids (PPs).

    To know the 4 clear stages in Economic Development shown by PP’s.

AKA Age-Sex Diagrams


Population pyramids

Population Pyramids

  • Reflect the past and present demographic trends in popn.

  • Wide base + narrow peak = high BR, large young popn, rapidly growing popn.

  • Steep vertical sides = ageing popn + low BR.

Excess of elderly women as they tend to have longer life expectancies than men.


Why do pp s have different shapes

Why do PP’s have different shapes?

Population Pyramids Stages


Facts

Facts

  • Number of countries with below-replacement fertility levels went from 19 in 1970 to over 50 in 2010.

  • Some geographers consider “popn explosion” to be over, and risk of “popn implosion”.

  • Estimates that between 2040 and 2050, global popn will decline by 85 million.


Dependency ratio

Dependency Ratio

Dependency Ratio = (% under 15) + (% over 65) x 100

% between 15 and 64

The dependency ratio tells you how many economically inactive people (0-15 and 65+) are dependent upon the economically active population (16 to 64).

The equation above calculates a figure which shows the number of economically inactive people that are reliant on 100 economically active people.

So a result such as 81.8 would mean that for every 100 economically active people there are 81.8 economically inactive people.


5 mark question

The Ageing Ratio is the

proportion of 65+ to

the whole popn.


5 mark question

Explain how these Population Pyramids show that the USA is more developed than Mexico. [6 marks]With reference to Mexico’s Population Pyramid,explainthe problems it will face in the year 2025. [6 marks]

Figures 2010


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