Juicy Life: Population Pyramids

Population Pyramids

Types of Population Pyramids

In order to understand how population pyramids work we should know they are 3 types of pyramids:

Expanding- They have a triangular shape, and they indicate high birth rate, usually due to lack of education and contraceptives and a high death rate due to the lack of medicines and a poor health system. They indicate a poor standard of living.
Stable- They have an elipse shape and they indicate a low birth rate due to education and access to contraceptives and a low death rate because of the access to medicines and doctors. They indicate a good standard of living.
Contracting- This pyramids usually show the population of a high developed country, this can be seen in the trend of decreasing the birth rate in the country.

Source
http://www.cdli.ca/courses/geog3202/unit06_org03_ilo02/b_activity.html