1. Population Pyramids a.k.a.
Population Diagrams
Population Structures
Age-Sex Diagrams
Age-Sex Structures
Age-Sex Pyramids

2. What is a population pyramid?
A visual representation of the population of a country.
graphically display a population's age and gender composition
show numbers or proportions of males and females in each age group
show gains of members due to immigration and birth, and loss of members due to emigration and death
reflect population growth or decline

3. Interpreting a Population Pyramid
Remember that a population pyramid is basically a bar graph turned on its side. Each line is showing you what percentage of the population is a certain age.
Examine the title and the type of data presented. (ex. Age breakup, numbers listed below, male-female notation.)
True pyramids are developing countries. The majority of the population is younger and not many people live to an old age. Developed countries are more rectangular; the population is spread more equally through the age groups.

4. How to interpret population pyramids
There main types of pyramids
Rapid growth
Slow growth
Negative growth
Shape of rapid
growth
Shape of
Slow growth
Shape of negative
growth

5. High, Slow & Negative Growth

6. Rapid growth

7. Rapid growth pyramids Have a large base to show high birth rates
Amount of people decreases as the ages goes up indicating a lower standard of living
Associated with developing countries like
Brazil, Uganda, China

8. Slow Growth

9. Slow growth pyramids Take on a more rectangular shape
Indicates population is remaining fairly steady
Birth rates and death rates are similar
Associated with developed countries like the UK, Germany, Canada

10. Negative growth

11. Negative growth pyramids
Looks like a reverse pyramid
Indicates the population of the country is decreasing
Death rates are higher than birth rates
Associated with developed countries like
Austria, Japan, Italy

13. What does a ‘Baby Boom’ look like over time. http://www. nd

14. Look at what else one can ‘see’ in these diagrams