It took until the year 1850 for the world to have a population of one billion.

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Presentation transcript:

It took until the year 1850 for the world to have a population of one billion.

Study of population Demographers Study the characteristics of human population as well as where people settle

Number of years for a population to double in size (like a bank deposit at compound interest) Doubling Time Doubling time = 45 years Doubling time = 54 years

Reading a Population Pyramid Every nation has a certain distribution of population by age group. India, for instance, has a young population; the majority of people are under the age of 30. To show how the population of a country is distributed by age, a population pyramid is a very useful tool.

Make your own Population Pyramid Males Females

Construct a Population Pyramid using the following population demographics Age GroupMales (2011 est) Females (2011 est) (years) ,000,000 31,000, ,000, ,000, ,000,000 23,000,000

High, Slow & Negative Growth

Developed vs Developing

Germany – many46.gif many46.gif many46.gif

Analyzing Population Pyramids What would this population pyramid represent? College or university—high population at years

Analyzing Population Pyramids Most of the population is ages and which shows the largest part of the population will be elderly. The population is decreasing What is this country going to need in the future?

Look at what else one can ‘see’ in these diagrams

Life expectancy- the average number of years an individual in the country is expected to live Birth and Death rates (mortality)- how many people are born or die for every thousand people in country in a given year

III. STAGES OF POPULATION GROWTH No Growth Rapid GrowthSlow GrowthNegative/Stagnant Before 1700 Birth Rate  Death Rate (Death rate is key since there are few health services, lots of diseases etc… Birth Rate  Death Rate  Latin America Asia Africa Locations: Birth Rate  Death Rate  U.S. Canada Indonesia Locations: Birth Rate  Death Rate  Europe Locations:

EMIGRATION Migration from a location IMMIGRATION Migration to a location

Pull Factors - raw materials, fertile land, availability of water -temperature/climate -jobs -education -religious freedom -stable government

Push Factors -limited resources -few jobs/poverty -climate/natural disaster -religious conflict -war -unstable government

-The young people generally are the ones that leave their developing countries in search of a better life.

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