Population Geography Chapter 5. How many people live here?
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Transcript of Population Geography Chapter 5. How many people live here?
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Population GeographyChapter 5
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Where are the people?
1. China ~1.3 billion2. India ~1.1 billion3. U. S. ~310 million4. Indonesia ~242
mil.5. Brazil ~201
million
6. Pakistan ~177 million7. Bangladesh ~158 million8. Nigeria ~152 million9. Russia ~139 million10. Japan ~126 million
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Cool Population Facts
• 3/5 (60%) of the world lives in Asia• 1/5 (20%) of the world lives in
China• 90% of the world live in the
Northern Hemisphere• The world has 2.2 billion children
(that’s 1/3 of the population)
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Geographers also use population density—the average number of people living in an area.
Population density includes size of its country, size of its population, and its environment.
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Thinking Critically:
Canada has a population density of 8 persons per square mile
Bangladesh is 2,361 persons per square mile
How would you explain this in terms of population density?
Canada
Bangladesh
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Which countries have the highest population
density?
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Emigrants—people who leave a country to live somewhere else (EXIT)
Immigrants—people who come into a new country to live (INTO)
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What does the future hold?
1804: World reaches 1 billion• 123 years later…
1927: World reaches 2 billion• 33 years later…
1960: World reaches 3 billion• 14 years later…
1974: World reaches 4 billion• 13 years later…
1987: World reaches 5 billion
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1999: Population reaches 6 billion
It is estimated that we will hit 7 billion in 2012 (now it will be Oct. 2011)
8 billion by 2025
And 9 billion by 2050
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• 7 Billion, National Geographic Magazine - YouTube
• 7 Billion: Are You Typical? -- National Geographic Magazine - YouTube
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Thinking Critically
• Why has the world’s population exploded?
• Could large populations be a problem? Why?
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Demographic Trends
Population is dropping in Europe, Japan, Australia because birth rates have dropped.
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Countries in Africa, Asia, and South America have exploding populations because of high birth rates.
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Even though the United States has slightly lower birth rates, a high level of immigration has kept the population high.
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How do you track population?
Population pyramids—a bar graph that shows the percentage of males and females and age groups in a given country.
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Purpose
Pyramids are used to show whether a population is growing or declining; it also indicates the breakdown of gender and age
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Create your own pyramid