1. Population Pyramids

3. What is a Population Pyramid?
A special kind of graph that shows demographic characteristics.

4. A population pyramid can show you…
Which stage of demographic transition a country is experiencing.
NIGERIA
USA

5. Population Pyramids Show..
Age-Sex Distribution of a country’s population between males and females of various ages.
MALES
FEMALES

6. Population Pyramids Show…
(Normally) the percentage of the total population in 5 year-age groups, with the youngest groups at the base and the oldest group at the top.
Japan’s Pyramid

7. Cohort
Each age-sex group in the population pyramid is called a cohort.

8. What does it mean if a country has a wide base?
Rapidly growing country
Large portion of young people
Typically a less developed country (LDC)

9. SUDAN: 2005

10. What does it mean if a pyramid looks more rectangular?
Even number of young, middle aged, and older people
Typically a more developed country

11. Population Pyramid for Australia

12. What else does a pyramid show?
Dependency Ratio- number of people in a population under the age of 15 and over the age of 64, compared to the number of working people who must support them.
Why would this be called the dependency ratio?

13. What can we tell about these countries based on their population pyramids?1 2 3

14. http://bcs. wiley. com/he-bcs/Books