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5-3 Human Population Growth

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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  1. Human Population Growth 5-3 Human Population Growth Copyright Pearson Prentice Hall

  2. 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

  3. 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

  4. 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

  5. Three Patterns of Population Growth Copyright Pearson Prentice Hall

  6. 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

  7. Future Population Growth Copyright Pearson Prentice Hall

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