1. Population Pyramids
APHuG

2. Population Pyramids
Allow you to visually see age & sex indicators of population and assess the demographic situation

3. Population in millions
Age
Parts of a pop pyramid
Population in millions

4. Generally three shapes
More rectangle or Ms. Smith’s attempt to make a vase out of clay (bumpy rectangle)
Reverse pyramid shape
Typical pyramid shape

5. Typical Pyramid Shape

6. Typical Pyramid Shape Life Expectancy Birth Rate CBR= 25 CDR= 6
Fertility Rate=3.1

7. Lumpy Rectangle Steady Birth and Death rates CBR=13 CDR=9
Fertility Rate =2
Slow Growth
WWI &II

8. Invertedish Triangle
Population is dying faster than it is being replaced
CBR=8
CDR=10
Fertility=1.4

9. Pop Pyramids can give us an understanding of:
Birth rate
Death rate
Life expectancy
Doubling rate
Population growing or shrinking
Effect of catastrophic events or national policies
AND

10. Dependency Ratio
Number of people dependent on the employed to take care of them:
0-15 & approx 65+
Must be supported by the year olds

15. Analyze – shape, dep ratio, what it tells you about the country

20. Circled area – WWII and WWI losses

21. Kenya over time

23. http://developers. arcgis
Awesome – click anywhere in US and it will give you the pop pyramid for that 1 sq mile and usually compare it to something else in the region. It starts with LA, but you can move to anywhere.