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POPULATION PYRAMIDS

POPULATION PYRAMIDS. Objectives. WHAT is a population pyramid? HOW to read a population pyramid? Recognise SHAPES of population pyramids. IMPORTANCE of population pyramids. What is a population pyramid?.

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POPULATION PYRAMIDS

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  1. POPULATION PYRAMIDS

  2. Objectives • WHAT is a population pyramid? • HOW to read a population pyramid? • Recognise SHAPESof population pyramids. • IMPORTANCE of population pyramids.

  3. What is a population pyramid? • It is a diagram that gives information about the proportion of males and females in each age group. • Also shows: - proportion of young people (0 -14 ) - proportion of working people (15 – 59) - proportion of elderly people (60+)

  4. What is a population pyramid? Vertical Axis - Age Groups Elderly dependents Working population Young dependents Horizontal Axis – Percentage / number

  5. How to read a population pyramid? • Read the title e.g. country or city or racial group • Comment on general shape of the pyramid • Note the proportion of people in various age groups • Note the sex ratio • Interpret the data

  6. Types of Population Pyramid • Expansive: rapid growth • Stationary: slow/stable growth • Constrictive: negative growth Shape of pyramids is controlled by • births, • deaths, & • migrations.

  7. Expansive Pyramid(Triangular Shaped Pyramid)

  8. Expansive Pyramid Title: India, 2000 Shape: Broad Base - high birth rates Narrow Top - small elderly pop - high death rate Proportion: Large proportion of young Sex Ratio: Balanced sex ratio

  9. Indonesia 2000 Malaysia 2000

  10. Stationary Pyramid

  11. Stationary Pyramid Title: Netherlands, 2000 Shape: Straight shape 14 yrs – 0 yrs Slow or no Population Growth - Low Birth Rates - Life-expectancy is high - Low death rates Proportion: Bars of equal length - Balance Proportion Sex Ratio: Balanced Sex Ratio

  12. Netherlands 2000

  13. Constrictive Pyramid

  14. Constrictive Pyramid Title: Hong Kong, 2000 Shape: Rocket-shaped / Narrow Base – Low Birth Rates, Slow pop growth Proportion: Large proportion of working population, 15-59 yr old - large group of economically active pop Sex Ratio: Balanced pyramid

  15. Hong Kong 2000

  16. Expansive Stationary Constrictive

  17. Each pyramid tells a story about the past, present & futureof a country & its people.

  18. Importance of Population Pyramids • Policy Planning ~ future housing estates ~ future schools • ~ future jobs ~ future infrastructure • Comparison with other countries ~ developed (US) vs developing (India)

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