Population Pyramids Decoded: Waves of Humanity

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Transcript of Population Pyramids Decoded: Waves of Humanity

  • 1. Population Pyramids Waves of humanity

2. What are population pyramids?

  • A population pyramid shows the history of the countrys population growth.
  • Governments use these graphs to make predictions about the future needs of their people .
  • Example 1- A high growth rate will mean more schools and daycares, while a slow rate might mean fewer will be needed.
  • Example 2- a large elderly population will mean more nursing homes and more pharmacists to sell their medicine.

3. Parts of a pop pyramid Title Y axis- Ageof people Oldest people on top Youngest people on bottom X axis- # of people of a certain age *Men are usually on the left side, women on the right. * * 4. Types of pyramids

  • Rapid Growth -abroad base , indicating a high proportion ofchildren , a rapid rate of population growth, and a low proportion of older people.
  • It has a general shape of a triangle.

5. Types of pyramids

  • Slow Growth/Stablea structure withbars that even outand reflect stable or slow growth over a period. A even proportion of elderly and children that reduces in number as the people become older.
  • It has a general shape of a pentagon.

6. Types of pyramids

  • Negative Growth a high proportion ofelderly personsanddeclining numbers.
  • It has a general shape of a hexagon.

7. Here come the problems 8. Rapid Growth

  • High Birth Rate - overcrowding,shortages of resources .
  • High Death Rate - a young population, ashortage of working adultsto care for children. Pressure for even larger families to replace large number that die.
  • Low Life Expectancy - People do not live very long.Poor health and tough living conditionswill keep the country young. The real problem starts when death rate decreases

*All of this is a recipe for instability! 9. Slow Growth/Stable

  • Fewer problems than other pyramids, however, governments must prepare for anconstantly expanding population .
  • Ever larger elderly population and young population means that priorities may be divided=not enough schools or retamas.
  • Low Birth rate - more kids survive and grow.
  • Low Death rate - Kids survive to be adults.
  • High Life expectancy -more workers and retirees. Fewer job openings makeseducation even more important . Also, adults more productive as theirworking lives are extended .Healthcare costs go upas they age.

*Stable, but changing society. 10. Negative Growth

  • Theworst long term consequencesof any pyramid.
  • Very Low Birth Rate - Young children are less common=less schools needed.Population will shrinkas fewer babies offset the elderly who die.
  • Low Death Rate -excellent living conditionsand healthcare allow people live a long time.
  • High Life Expectancy -Elderly population becomemajority in a country . Government must boost spending on healthcare and other programs to help the older population.
  • We need people! - Fewer job openings= higher unemployment for younger adults. Ironically, as the pop. decline grows, there will befewer people to fill those jobs.

*Immigration needed, but some instability as the new arrivals change the culture. 11. Where they happen

  • Red and orange areas
  • Developing
  • countries

Rapid Growth

  • Why here?
  • Low GDP
  • Low Standard of living
  • low literacy
  • High Infant mortality

12. Where they happen

  • Some Blue/ light blueareas
  • Developed
  • countries

Slow Growth/Stable

  • Why here?
  • High GDP
  • High Standard of living
  • High literacy
  • Low Infant mortality

13. Where they happen

  • Some Blue/ light blueareas
  • Developed/Developing
  • countries

Negative Growth

  • Why here?
  • High GDP, in decline
  • High Standard of living, maybe in decline
  • High literacy
  • Low Infant mortality

Usually caused by political, economic, or societal decline 14. Other factors?

  • Personal choice and changing gender roles may play an increasing role in population growth change.