Do NowDo Now: Answer the following question in complete sentences.

What can we learn from What can we learn from population pyramids?population pyramids?

How do population pyramids help us learn

about population?

Population pyramids are used to show information about the age and gender of people in a specific country.

Male Female

Population in millions

In this country

there is a high Birth

Rate

There is also a high

Death Rate.

This population pyramid is typical of countries in poorer parts of the world (LDCs = lesser developed countries)

In some LDCs the government is

encouraging couples to have smaller families. This means the birth

rate has fallen.

Male Female

Population in millions

In this country the number of people in each age group is

about the same.

The largest category of people were born about 40 years

ago.

In this country there is a low Birth Rate and a low Death Rate.

This population pyramid is typical of countries in the richer parts of the world (MDCs = More developed

countries)

Population in millions

Male Female

In this country the birth rate is decreasing.

In the future the elderly people will make up the

largest section of the population in this

country.

This is happening more and more in

many of the world’s richer

countries.

Male Female

Population in thousands

This country has a large number of temporary workers.

These are people who migrate here especially to find

a job.

Population pyramid for Mozambique.

Population pyramid for Iceland.

What can we infer about these two countries’ level of development?

Their birth and death rates?

Access to family planning?

Education of women?

Their futures?

Creating and Interpreting Creating and Interpreting Population PyramidsPopulation Pyramids

Partner work:Use the data to help you create a population pyramid for the two mystery countries.

Check in – which countries could these be and why?

Independent work:Complete the exit slip that asks you to interpret the pyramids!

Do NowDo Now: Answer the following questions in complete sentences.

What are some of the problems the world is facing due to What are some of the problems the world is facing due to overpopulation and global aging?overpopulation and global aging?

How can we solve these problems?How can we solve these problems?

Use at least 2 details from the film, “World in the Balance” in each answer.

What is the demographic transition model? And what can

the model tell us about world population?

Demographic Transition ModelDemographic Transition Model

DTM DTM seeks to explain the transformation of countries from having high birth and death high birth and death rates rates to low birth and low birth and death ratesdeath rates.

It seeks to explain how countries go from being lesser developed to more developed.

Leastdeveloped

Mostdeveloped

Demographic Transition ModelDemographic Transition Model

There are 4 stages of development and each has a distinct looking population pyramid.

Let’s see some examples of each…

Stage 1 Expanding: Chad, Africa in 1980 or India in 1900

Male Female

Population in millions

In this country

there is a high Birth

Rate

There is also a high

Death Rate.

This population pyramid is typical of countries in poorer parts of the world (LDCs = lesser developed

countries)

Stage 1 Expanding

Male Female

Population in millions

Characteristics of Stage 1:

•High fluctuating birth and death rate

•No great population growth

•Very basic living standards

•Population based on food supply

•No family planning: many children needed to work

•Disease/famine common! Many babies die.

•Very few groups in Stage 1, only primitive hunter-gatherers in remote areas

Stage 1 Expanding

Example: Remote Amazonian tribe

Characteristics of Stage 1:

•High fluctuating birth and death rate

•No great population growth

•Very basic living standards

•Population based on food supply

•No family planning: many children needed to work

•Disease/famine common! Many babies die.

•Very few groups in Stage 1, only primitive hunter-gatherers in remote areas

Stage 2 Expanding: Egypt, Kenya, India today

In this country

there is a high Birth

Rate

There is a fast

falling death rate

This population pyramid is also typical of countries in LDCs

Stage 2 Expanding Characteristics of Stage 2:

•High fluctuating birth rate and lowering death rate

•Population explosion!

•Basic living standards

•Little family planning, children needed for farming

•Infants surviving!

•Most developing countries are in this stage

Stage 2 Expanding Characteristics of Stage 2:

•High fluctuating birth rate and lowering death rate

•Population explosion!

•Basic living standards

•Little family planning, children needed for farming

•Infants surviving!

•Most developing countries are in this stageCambodia

(above),

South Africa (right)

Stage 3 Stationary: Brazil, China, India in 2025

This population pyramid is typical of countries in Moderately DCs

Low birth rate

Low death rate

Stage 3 Stationary Characteristics of Stage 3:

•Birth rate is falling, death rate falling more slowly

•Pop. beginning to stabilize

•Improved medical care and diet

•Fewer children needed

•Lower infant mortality rates

•Women have more access to education, family planning and jobs

•Most moderately developed countries

Stage 3 Stationary Characteristics of Stage 3:

•Birth rate is falling, death rate falling more slowly

•Pop. beginning to stabilize

•Improved medical care and diet

•Fewer children needed

•Lower infant mortality rates

•Women have more access to education, family planning and jobs

•Most moderately developed countriesRio de Janeiro, Brazil

Stage 4 Contracting: England, Japan, Germany

This population pyramid is also typical of countries in Highly DCs

Stage 4 Contracting Characteristics of Stage 4:

•Birth rate is low, death rate is low

•Pop. is slowly decreasing

•Good health care, reliable food supply

•Family planning

•Improving status of women, later marriages

•Highly developed countries

Stage 4 Contracting Characteristics of Stage 4:

•Birth rate is low, death rate is low

•Pop. is slowly decreasing

•Good health care, reliable food supply

•Family planning

•Improving status of women, later marriages

•Highly developed countriesEngland (above),

Japan (right)

Creating and Interpreting Creating and Interpreting Population PyramidsPopulation Pyramids

Partner work:Use the data to help you create a population pyramid for the two mystery countries.

Check in – which countries could these be and why?

Independent work:Complete the exit slip that asks you to interpret the pyramids!