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Demographics

Explore the study of populations and how it helps answer questions about school closures, retirement age, and popular culture. Learn about population pyramids, dependency load, historical trends, and the Rule of 70. Discover the significance of changes in population density and growth rates.

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Demographics

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  1. Demographics Geography of Canada www.CraigMarlatt.com/school

  2. The Study of Populations • Demography is the study of populations. It helps answer questions such as • Why are more schools closing than opening? • Why will you likely have to work more years than your parents before retiring? • Why are old rock-and-roll groups, such as the Rolling Stones, still so popular?

  3. The Study of Populations • The best way to compare populations of different countries is through population pyramids. • It is a “paired horizontal bar graph” with females on the right…

  4. The Study of Populations …and males on the left. • Both sides show the percentages of people in each age group.

  5. The Study of Populations • Putting the two sides together can allow you to easily compare a country’s population for different years (or to compare different countries).

  6. The Study of Populations • The dependency load is the part of the population that needs to be supported. It is made up of two components: the 0–14 age group and the 65+ age group.

  7. The Study of Populations • What has happened to the dependency load between 1956 and 2004? • What is the significance of this change?

  8. The Study of Populations • A specific pattern of population growth has occurred in many developed nations during the past 60 years. Baby Boom Baby Echo Births Generation Y Generation X 1965 2025 1945 1985 2005

  9. Population Density

  10. Population Density

  11. Population Density

  12. Population Density

  13. Historical Trends of Populations

  14. Compounding • What is the Rule of 70? • Why is the Rule of 70 so useful? • How long would it take for a population to double with each of the following growth rates? • 0.5% • 1.0% • 1.5% • 2.0% • 3.0% • What happens with a negative growth rate? Use Russia’s -0.4% growth rate to explain.

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