Class Notes

1. Population Pyramids
• Graphically represent the age gender distribution of certain population
• Can be represented by region or by country
• Help human geographers determine what is happening to individual populations across the globe.
2. Elements of population pyramid
Age: Young at bottom old on top
Gender: male on left female on right
Young and old populations: % of populations under age15: global average is 30 percent, low is 17 percent(Europe): high of 42 percent (Africa): High number indicates great potential for future growth; Percentage of population over age 65; identifies need for health care and other social services
Life expectancy: average numbers of years a person is expected to live; affected by many factor.
3. Using the pyramid
What's it good for
• Which country has an overall higher life expectancy
B
• Which country has a larger % of young population
A
• If both countries currently have the same population, which countries population will be twenty years from now? Why?
B because it stays basically even form bottom to top. When A has a very short life expectancy