Do Now Do Now: Answer the following question in complete sentences. What can we learn from 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. MaleFemale 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.

MaleFemale 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 MaleFemale 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 Population 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 Now Do Now: Answer the following questions in complete sentences. What are some of the problems the world is facing due to overpopulation and global aging? 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 Model DTM high birth and death rates low birth and death rates DTM seeks to explain the transformation of countries from having high birth and death rates to low birth and death rates. It seeks to explain how countries go from being lesser developed to more developed. Least developed Most developed

Demographic 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 MaleFemale 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 stage Cambodia (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 countries Rio 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 countries England (above), Japan (right)

Creating and Interpreting Population 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!