5-3 human population growth – Flashcards
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How is the size of the global human population changing with time?
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increasing (exponential growth)
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Why did the population grow slowly for most of human existence?
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many limiting factors (life was harsh)
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Why can't the human population keep growing exponentially forever?
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resources are limited and they will eventually run out
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What factors help predict why the populations of some countries grow faster than others?
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higher birth rates, lower death rates , and comparing age structure diagrams of populations
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What factors lower the death rate?
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improved sanitation and healthcare, industry made life easier, and the food supply became more reliable
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Changes brought about by modernization lower the ___
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death rate
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When births greatly exceed deaths, results in rapid population ___
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increases
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What may cause the growth rate of the world population to level off or even slow down?
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demographic transition
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Demographic Transition
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transition from high birth and death rates to lower birth and death rates as a country develops
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Age Structure Diagram
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shows the number of people by gender in each age group in the population
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Demography
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scientific study of human populations
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carrying capacity
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population reaches a stable equilibrium phase
