Please turn in your Culture CollageThen…Quick Discussion…

What is the population of the world? Which of the following factors has the LEAST influence on population growth rates?A. ClimateB. EducationC. Government policyD. Role of women in society

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Construct and analyze population pyramids and use other data, graphics, and maps to describe the population characteristics of different societies and to predict future growth trends

How many people live here?

6 Billion

Population Density - Average # of people in a square mile or sq. Kilometer

What determines where people live?

•2/3 of the earth is water

•1/2 of the land is almost unlivable - harsh deserts, rugged Mtns, too cold

People live -

•small % land

•fertile/water/

•mild climate

Population Density cont.•Divide total population of a region by the regions land area

•can be misleading,

•Egypt - 90% of land is desert, people live on a narrow strip of land along the Nile

Arable land - (farmable) -

Egypt - (2000)

•177 per sq mile

•Arable - 8,839 per sq. mile

Population Growth -Population Growth -

It is going up, but

WHY?WHY?

•Technology help food

production

•improved medical care (live longer)

Effects of Growth? (beliefs)Effects of Growth? (beliefs)

•Increases in famine, Increases in famine, disease, and natural disease, and natural resource depletionresource depletion

•others believe technology others believe technology and new ideas solve and new ideas solve problemsproblems

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

(LEDCs.)

What does a population pyramid consist of?

•Stable pyramid- Shows an unchanging pattern of fertility and mortality•Stationary pyramid- Typical of countries with low fertility and low mortality.•Expansive pyramid- Broad base, indicating a high proportion of children, a rapid rate of population growth, and a low proportion of older people. This wide base indicates a large number of children. A steady upwards narrowing shows that more people die at each higher age band. This type of pyramid indicates a population in which there is a high birth rate, a high death rate and a short life expectancy This is the typical pattern for less economically developed countries, negative environmental factors (for example, lack of clean water) and poor access to health care.•Constrictive pyramid- lower numbers or percentages of younger people. The country will have a greying population which means that people are generally older, as the country has long life expectancy, a low death rate, but also a low birth rate. This pyramid has been occurring more frequently, especially when immigrants are factored out, and is often a typical pattern for a very developed country, a high over-all education and easy access and incentive to use birth control, good health care and few or no negative environmental factors.

Patterns in Population Pyramids

In some LEDCs 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 (MEDCs.)

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 happens next?

What is going to happen to Japan’s population in the future?

Why does this matter?

Make your own Population Pyramid AGE MALE FEMALE 70+ 1.9 3.2 60-69 3.0 3.6 50-59 3.8 4.2 40-49 5.7 6.6 30-39 9.6 9.2 20-29 9.8 9.5 10-19 7.1 6.8 0-9 8.2 7.9• COLOR FROM THE BOTTOM TO THE TOP!!