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5-3 Human Population Growth PowerPoint PPT Presentation


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Human Population Growth. 5-3 Human Population Growth. Patterns of Population Growth. Patterns of Population Growth The scientific study of human populations is called demography.

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5-3 Human Population Growth

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5 3 human population growth l.jpg

Human Population Growth

5-3 Human Population Growth

Copyright Pearson Prentice Hall


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Patterns of Population Growth

  • Patterns of Population Growth

    • The scientific study of human populations is called demography.

    • Demography examines the characteristics of human populations and attempts to explain how those populations will change over time.

    • Check out the Demographic Data . .

Copyright Pearson Prentice Hall


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Patterns of Population Growth

  • In stage 1, there are high death rates and high birthrates.

  • In stage 2, the death rate drops, while the birthrate remains high. The population increases rapidly.

  • In stage 3, the birthrate decreases, causing population growth to slow.

Copyright Pearson Prentice Hall


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Patterns of Population Growth

U.S. Population

80+

Females

Males

60–64

Age (years)

40–44

20–24

0–4

8 6 4 2 0 2 4 6 8

Percentage of Population

  • Age Structure Diagrams (Power Pyramids)

    • Demographers can predict future growth using models called age-structure diagrams.

    • Age-structure diagrams show the population of a country broken down by gender and age group.

Copyright Pearson Prentice Hall


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Three Patterns of Population Growth

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Future Population Growth

  • Future Population Growth

    • To predict human population growth, demographers must consider the age structure of each country, as well as the prevalence of life-threatening diseases, technology, sanitation, etc.

    • World Clock (gen. estimate)

    • Population Outlook

    • What is our carrying capacity?

    • Most estimates put it between 10-20billion

Copyright Pearson Prentice Hall


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Future Population Growth

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