Presentation on theme: "How we observe and document population trends Population Pyramids."— Presentation transcript:
How we observe and document population trends Population Pyramids
Population Pyramids… … are illustrations divided into [male] and [female] columns that show the distribution of ascending age groups in a selected population
Patterns of Population Pyramids
Rapid Growth Pyramids Pyramids that are shaped like an inverted V can be explained by many different factors, including: Poverty A Lack of Birth Control A 3 rd World Economy A Lack of Healthcare Low Standards of Living Low Cost of Living
Slow Growth Pyramids Pyramids that are shaped like a beehive can also be explained by many different factors, including: Relative Wealth Birth Control & Education A 1 st World Economy Some/Good Healthcare Good Living Conditions Moderate Living Costs
Negative Growth Pyramids Pyramids that are taper towards the bottom can be attributed to many different factors, including: Abundant Wealth Extensive Birth Control & Education A 1 st World Economy Extensive Healthcare Excellent Living Conditions Expensive Cost of Living
Creating a Population Pyramid 1. Take your Age-Sex Data Table and observe the population of Country A: 6,420, Now look at the number of Males from the age of 0-4: 479, ,894 / 6,420,792 =.0747, or 7.5% 4. You multiply the product by 100 to achieve a percentage, then round up to the nearest half. 5. Now take your Age-Sex Graph and draw a vertical line between 7 and 8 (7.5%) in the bottom left bracket (Males 0-4). Color the area from this line to the centerline blue to represent the percentage of the population which are males from the ages of 0 to 4. When you duplicate this process for the other side, use a pink or red color to represent females from the ages of 0 to Continue repeating steps 1 through 5 all the way to the 100+ bracket using the data from your Age-Sex Data Table.