- Slides: 7
Population Pyramids Mr. Jopowicz
Population Pyramids • Population pyramids are a fast and easy way to visualize the development levels of different countries. It’s a type of graph. • They are a snapshot of the population divided into male and female and then further divided into different age groups or cohorts.
Parts of the Pyramid: the y-axis • The pyramid is divided in half by male and female along the y-axis • Going up or down the y-axis goes up and down in age-young at the bottom and old at the top
Parts of the Pyramid: the x-axis • The x-axis has numbers that indicate the percentage of the male or female population. • The y-axis is 0, then 1 means 1%, 2=2%, 3=3% and so on.
The Complete Pyramid • Once the data is placed on the graph, its done! • The next job is to describe its shape. Pear or Bell? Apple?
Shapes and Differences • You will notice that if you compare several developed, developing and underdeveloped countries to each other, the graphs have a similar shape. • Graphs of countries that are at different levels of development look different. • Therefore the shape of a nations’ population pyramid tells you its’ level !
TEKS § 113. 34. World Geography Studies (One Credit). (7) Geography. The student understands the growth, distribution, movement, and characteristics of world population. The student is expected to: (A) construct and analyze population pyramids and use other data, graphics, and maps to describe the population characteristics of different societies and to predict future growth trends; (B) explain the political, economic, social, and environmental factors that contribute to human migration such as how national and international migrations are shaped by push-and-pull factors and how physical geography affects the routes, flows, and destinations of migration; (C) describe trends in past world population growth and distribution; and (D) develop and defend hypotheses on likely population patterns for the future.