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## Resources for Pyramid Building

• Washington State

• Population Pyramids in K-12 Education:
• Pyramid Building Overview: The purpose of this lesson is to provide students with the background to understand the importance of age structure on population growth. They do this by creating a population pyramid. This process will also help them understand the meaning of different shaped "pyramids" and the impacts of these different growth patterns.

• Population Pyramids and Us Overview: When geographers want to examine the population of a given area, they may employ maps to help them see distribution patterns or employ photographs to analyze cultural activities. When geographers want to examine the structure of a population and the potential for growth in that population, they turn to a basic tool in demography: the population pyramid.

• Online Tutorial - Population & Development [The Geography Portal]

• Population Pyramid [Causeway Graphical Systems]

• Population of the United States, by Age and Sex, 1950-2050 (millions) [animated]

• IDB Population Pyramids This page allows you to obtain population pyramids (graphs that show the distribution of population by age and sex) for one country.
Type of output: Summary (1997, 2025, 2050). Select years. Dynamic.
Graph size: Small; Medium; Large

• US Age Distribution, 2000

• Worksheet for Population Pyramids

• Building Communities for Tomorrow (Iowa) A population pyramid graphically displays the age by sex data of a community at one point in time. The graph helps to easily see the age distribution of both males and females at a glance. By comparing population pyramids from various years (for example, past, present, projected) it is easy to see changes in the age structure of a community's population. It is also a very visual way to compare the community you are studying to another community to the state.

• Population Pyramids (Explanation of concept) || Illustration (1961 data / Canadian Schoolnet) "The standard bar graph is a convenient way to illustrate data. Bars allow the student to easily identify and compare relationships within a variable, by using a graphic representation of the number of cases per interval. The length of the bar is proportional to the number of cases in the interval."

• Population Pyramids / Age Structures [The Mining Company]

• United Nations: World at 6 Billion, World Population Pyramids for 1990 and 2050

• Aging Population [http://www.ac.wwu.edu/~stephan/webstuff/aging/] 14 countries, 1997 and 2050.

• Germany (1997)

• Michigan, 1900, 1930, 1960, 1990, 2020 (fig 1 & 2) "Population pyramids show the relative size of each age and sex category. The youngest age group is at the bottom and the oldest is at the top; males are on the left and females are on the right. The pyramids in Figure 1 are drawn to a uniform scale in order to illustrate the growth in the size of the population. The distance between each vertical line in Figure 1 represents 100,000 persons. The pyramids in Figure 2, on the other hand, are all equal in total size in order to better illustrate the changing structure of the population by age and sex."

• Some other Geog Prof's Pyramid Exercise