Demography - the study of populations: birth & death rates, marriages, families, etc...
Population Geography. Demography -statistical study of human populations Demographers study pop....
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Transcript of Population Geography. Demography -statistical study of human populations Demographers study pop....
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Population Geography
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• Demography -statistical study of human populations
• Demographers study pop. patterns & trends• Use these statistics to predict future
population changes
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• Why do we (city planners or other leaders) need to know about our population in the future?
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• Schools• Roads• Police & Fire Services• Jobs• Nursing Homes, Home Health, Housing
for elderly• Daycare• Entertainment
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• Knowing pop. trends (either increasing or decreasing) can help govts. plan for future.
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• Population Density -avg. # of people per square mile
• Pop Density = number of people land area
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Pop. Density in U.S. Counties
Loving, TXForest, WIBlue Earth, MNHonolulu, HISan Francisco, CAManhattan, NY
0.10 p/sq. mi.10751,44816,25667,255
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Case Studies
• Canada8/sq.mi.31.6 mil. pop3,851,806 sq. mi.Most people live
along s. border
• Bangladesh2,361/ sq. mi.131 million pop.55,599 sq. mi.Pop. evenly
distributed
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Population Distribution
Pop. is unevenly distributedMajor pop. Clusters• East Asia (China)• South Asia (India)• Europe• Eastern North America (BOSWASH)
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Why is the world’s population so unevenly distributed?• People tend to live in areas that are
favorable to settlement• 90% live in N. Hemisphere- 2/3 in mid-
latitudes • Many cluster on fertile plains, near
water. What areas would people avoid?
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Top 10 Most Populated Countries
1. China2. India3. U.S.4. Indonesia5. Brazil
6. Pakistan7. Russia8. Bangladesh9. Nigeria10.Japan
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Population Change
• The # of people in any place is the result of 3 major factors
1. Birthrate -# of births each year for every 1,000 people in an area
2. Death Rate -total # of deaths each year for every 1,000
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3. Migration -the process of moving from one place to live in another.
a. Emigrants -People who leave a country to live somewhere else
b. Immigrants -People who come to a new country to live .
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• Geographers study migration by looking at push & pull factors
1. Push factor -things that make people leave a location (become an emigrant)
2. Pull factors -things that attract you to a new location (become an immigrant)
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Push Factors
• Lack of jobs• Discrimination• Lack of religious
freedom• War• Famine
• Natural Disasters• Unpleasant
climate
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• Refugees -People who are forced to leave their homes because of war or political unrest.
–Ex: Albert Einstein – a Jew who fled Germany during the Holocaust.
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Pull Factors
• Jobs• Political
Freedom• Religious
Freedom• Education• Reunite w/
Family
• Good Climate
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Population Pyramids
• Shows the age & sex distribution of a population• Shows the history of a country’s
population growth—Ex. Baby Boom Generation in U.S.
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• Country’s pop. Pyramid can show 1 of 3 types of growth
1. Rapid growth-wide at the base (Ex: Haiti) …looks like a true pyramid
2. Slow growth- straight up and down or a little wider at base than top (Ex: US)
3. Negative growth-broader at top than bottom (Ex: Germany)
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Brainstorming
• Reasons why some countries have high birth rates? (Have lots of children?)
• Reasons for high death rates?
• Reasons why some countries have low death rates? (Have few or no children?)
• Reasons for low death rates?
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Stages of Population Growth
• Countries experience three stages of population growth as their economies develop.
• • *Stage One: Birthrate and death rate are equally high• • *Stage Two: Birthrate remains high while the death rate
declines• • *Stage Three: Birthrate and death rate are equally low
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