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Unit 1 Populations in Transition

Explore the study of population and the patterns and projections of population at different scales. Learn about the top 10 most populated countries, the world population increase, and the slowing population growth. Understand the structure of populations through population pyramids and gain insights into world population facts.

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Unit 1 Populations in Transition

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  1. Unit 1 Populations in Transition Population Patterns and Projections

  2. Studying Population • Demography is the study of Population • Population can be studied at the local, regional national and global scales. • At the national scale, governments often conduct a census so that changes in population patterns can be monitored • Graphs called Population Pyramids or Age-Sex Pyramids can be used to show the population structure of a place.

  3. World Statistics • 264 births per minute • 107 deaths per minute • Natural Increase (Births – Deaths) 158 per minute • 12 Infant deaths per minute • How many children will be born during your Geography lesson today?

  4. World’s Top 10 Most Populated Countries

  5. The World’s top ten countries • Nations tend to be ranked by the size of their population or by the area of the land they occupy. • The top ten most populated countries have not changed in the past five years. • However, India is increasing its population more rapidly than China • By 2009 Nigeria had overtaken Russia to be the 8th largest nation

  6. World Population Increases Can you estimate the world population figure around the year you were born? Notice how the gradient of the blue line is shallowing

  7. World Population Trends • Currently in 2010 the world population stands at 6.76 billion. • In 2050 it is expected to increase to around 9.3 billion. • The rate of growth of world population is slowing. Can you suggest why?

  8. Population Growth is slowing As many places in the world increase the standard of their living family size decreases Although world population continues to rise there are fewer children born around the world and adults tend to live longer than ever before.

  9. Continental Breakdown Asia = 4.05 billion Africa = 1 billion Europe = 825 million North America = 530 million South America = 385 Million Oceania = 39 million

  10. The Americas About 530 million people live in North America Approximately 385 million people live in South America Notice in the USA how most people live in the East. Can you suggest why?

  11. The Population Pyramid High age groups in the pyramid show high life expectancy Rapidly tapering bars show an increasing death rate Bars of near equal size show low infant mortality A short base bar indicates a low birth rate Adapted from Source US Census Bureau International data base

  12. The Power of Pyramids • Pyramids tell us about the structure of a population. • For example Gender Balance • Things about Fertility (Births) • Things about Mortality (Deaths) • Age Specific Data (Gender/No. of Individuals) • How the population will change with time. • Did you spot an age group that represented a baby boom in the USA pyramid?

  13. Facts about World Population • 48% of the population live on less than $2 per day • By 2050 Africa’s population will have doubled to about 2 billion • By 2050 1.2 billion of the world’s population will be between 15 and 24. 9/10 of these will be from developing nations

  14. Things To Do • 1 On an outline map of the world plot on the location of the top 10 most populated countries • 2 Using the table on Slide 4 construct a column graph to show the population increase in the countries between 2005 and 2009 • 3 What is a census? Why do governments conduct them? • 4 What will the world population be in 2050? Do you think the world will cope with this number? Why/Why not?

  15. Useful Websites http://www.docstoc.com/docs/12346008/2009-World-Population-Data-Sheet http://www.census.gov/ipc/www/idb/informationGateway.php http://www.worldometers.info/population/ http://www.prcdc.org/globalpopulation/Population_Projections/

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