Population and Migration Chapter 2 - Population Pyramids
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| Demography | is concerned with population growth and the characteristics of the population
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| Important Characteristics | age and gender
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| Sex Ratio | the number of males compared to females in a population
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| Population Pyramid | analyzing it is one of the easiest ways to identify a population's sex ratio
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| Population Pyramids | chart populations on a graph
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| Population Pyramid Graphs | breaks down the population based on both gender and age and can be analyzed in terms of the DMT
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| Population Pyramids | good ways to analyze population projections
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| Population Projections | use demographic data to determine future population
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| Population Projections | only work if the governmental structure and cultural customs remain the same
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| Population Pyramids of Less Developed Countries | have a wide base because the majority of the population is under the age of 15.
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| Dependancy Ratio | says that those ages 0-14 and over 65 depend on the workforce for support
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| Demographic Momentum | is a continued population increase as a result of a large segment of the population being young
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| Demographic Momentum | countries in stage two have it
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| Negative Growth | when the country begins to lose population (stage 4)
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| Population Pyramids | do not only have to be used on a national scale, but can be used to describe cities or even neighborhoods
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| Information Gathered | allows governments to develop policies and allocate resources to meet the current and future needs of the population
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