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Left side of pg. 10:

What is the purpose of a population pyramid? What information do they show?

What information can we get from a population pyramid?

In pairs consider the factors that influence the population structures in both more developed and less developed countries.

REASONS FOR SHAPE OF MDC PYRAMID

Lack of endemic

fatal diseases

Wide spread

birth control

Desire to follow

careers

Low infant mortality

What factors influence population structure in Developed Countries (think factors that control death rates and birth rates)?

Greater equality

for females

Japan

Gently sloping sides – this suggests that there is a low Death Rate

More people in the top half of the pyramid and lower numbers of younger people – this gives a rather top heavy appearance.

Fairly wide tops – which suggests that there is a low Death Rate and high life expectancy.

Fairly narrow bottoms – which means a fairly low Birth Rate

Good levels of sanitation

Balanced and full diet

Widespread

medical care

Exit Slip: What will the population structure look like in 2050?

Many more people in the youthful pyramid base i.e. it looks more pyramid in shape

Fairly broad bases – this suggests a high Birth Rate

Steeply sloping sides as many people in each successive cohort die – this suggests a high Death Rate

Very narrow tops – this suggests a high Death Rate

Sierra

Leone

Which one is Japan and which is Sierra Leone? Provide evidence (2-3 sentences)

REASONS FOR SHAPE OF LDC PYRAMID

Malnutrition and under-nutrition

Lack of Health

Education

High Infant mortality rates

Desire to have

large families

War

What factors influence population structure in less developed countries (again think birth and death rates)?

Lack of

birth control

Endemic and epidemic

diseases

Poor Sanitation

Lack of

medical care

Degree

of Poverty

With a partner, using an available electronic device, navigate to the website "CIA World Factbook."

Complete your "Country Profile" handout and your population pyramid on pg. 9 using the information you find. Be sure to explain why these demographics influence the development level of your country.

Which pyramid is which?

On the right side of page 10, draw these two population pyramids. One is an MDC, the other is an LDC - we will discuss which one is which.

If cohorts get smaller or larger in the pyramid then this can provide information about

The age groups are in 5 year groups & called cohorts.

Population pyramids show a cross section of a population at a particular moment.

They divide the population by gender i.e. male and female and by age.

How and why population pyramids of an LDC & an MDC are different

Annotate onto your pyramid the shape, consider

  • Top
  • Base
  • Overall shape

Any combination of these

Right side of pg. 10: LDC/MDC Population Pyramids

Changes in birth rate

Changes in the movement of people - migration

Changes in death rate

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