Ned Baring Lesson 1 population


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Ned Baring Lesson 1 population

  1. 1. Access Geography Unit 2 Lesson 1: Introduction to Population
  2. 2. Learning Objectives: • Feedback from Unit 1 • Course outline • Define key population terms • Describe global distribution patterns • Analyse the factors • Describe population milestones
  3. 3. Unit 2 This follows naturally from the study of settlements. • Look at patterns and trends in global population • Examine key statistical indicators • Examine different ways of representing these statistics graphically • Show how these vary in countries with differing levels of economic development • Explain the reasons for contrasts between these countries • Look at migration patterns • Examine urban issues in developing and less developed countries
  4. 4. Population key terms • What are the key geographical concepts? • Time, space and scale • Population numbers, structures and movements, change over time, space and scale • Micro (local) • Meso (regional) • Macro (global)
  5. 5. Key terms You need to match the 25 population terms to their definitions There are 25 of them
  6. 6. Population Density vs. distribution Population density= Total number of people Area km2
  7. 7. Natural increase - =NI We are looking at the Crude birth rate and crude death rate so what will the units of N.I be?
  8. 8. The DTM
  9. 9. Economically active, Non active and dependant population
  10. 10. Economically active
  11. 11. Economically non active
  12. 12. Dependant population
  13. 13. Dependancy ratio is the ratio between
  14. 14. A high dependancy ratio
  15. 15. A low dependancy ratio
  16. 16. Can you work out a dependency ratio 1. New Zealand total population 4,268,900 23% less than 16 and 12% more than 65. What is there dependency ratio? 2. Here are some statistics on Japan’s population, What is their dependency ratio?
  17. 17. Replacement ratio In MEDCs On average each woman needs to have 2.1 childern to keep the population size the same In LEDCs the number is more like 2.3 Why is there this difference?
  18. 18. Migration balance This the difference between the number of people leaving (emigrants) and the number of people arriving (immigrants) - = Migration Balance
  19. 19. Crude Birth and Death rates • Crude rates tell you the number of births and deaths in a country per 1000 members of the population. • This is essential if we want to know whether the population is growing or shrinking (Natural Increase) BUT THEY CAN BE MISLEADING…
  20. 20. Hungary Population: 10 million Births every year: 9,900 CBR= Somalia Population: 10 million Births every year: 410,000 CBR= The Crude Birth rate does not give us a great picture of the number of children women are having in a country Fertility rate gives us a better picture of how many children women are having at any one time in a country Fertility rate for Hungary 1.3 Fertility rate for Somalia 6.1
  21. 21. World population density • This is a dot map to represent global population density and distribution. What factors have influenced this distribution?
  22. 22. Construct a pie chart • Land makes up 30% of the earths surface • Of this, only 11% is habitable • So where does everybody live? • Where do they move from/to? • Use these stats to construct a pie chart: • 23% lacking minerals • 28% too dry • 11% habitable • 6% permafrost • 10% waterlogged • 22% soil too thin
  23. 23. What factors influence this distribution pattern? Can we put them into two categories? Discuss how each factor can influence distribution?
  24. 24. Population changes in time • Populations are dynamic and constantly change over time and space. Population change is another example of an open system with inputs, processes and outputs. births immigrants emigrants deaths Natural change migration
  25. 25. Population milestones • Estimated to be 500 million by 1650 • First billion reached in 1802 • Second billion in 1928 (after 126 years) • 3 billion in 1961 (33 years) • 6 billion in 1999 (a billion every 13 years) • In 2010 – estimated that worlds population was still growing by 1.17% yearly
  26. 26. Population projections Population division of the UN Predicted the world population in 2050 will be: • 7.3m (low estimate) • 8.9m (medium) • 10.7m (high) • By that time one third of the worlds population is likely to live either in India or China.
  27. 27. Home Study 1. Choose a country and produce a short summary of how its population is distributed 2. Attempt to produce an explanation of the influencing factors involved in the population density and distribution This is due next Monday