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Essential Question
•How do you interpret a population pyramid?(7.3.21)
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What percentage of the population do you represent in this graph?
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What is a population Pyramid?
A visual representation of the population of a country.
• It is a graph that displays a population's age and gender composition
• show numbers or proportions of males and females in each age group
• reflects a country’s birthrate and death rate
• reflects population growth or decline
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POPULATION STRUCTUREThe population pyramid displays the age
and gender structure of a country or given area
Population inFive Year
Age bands
Usually, but not always,Given in a percentage to make for easier
comparisonsbetween countries
FEMALESTo the rightMALES
To the left
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Population pyramid of a less developed nation
Population Pyramid of Nigeria (1995)
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Interpret a Population Pyramids
A TRIANGLE SHAPED POPULATION PYRAMID MEANS:
•Birth rate is high and Death rate is high
• high Infant mortality rate
•Low Gross Domestic Product
•Low quality of life, such as little medical care, inadequate food supply or poor water quality.
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Population pyramid of a developed nation
Population Pyramid of Sweden (1995)
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Interpret a Population PyramidsA DIAMOND SHAPED POPULATION
PYRAMID MEANS:
•BIRTH RATE IS LOW AND DEATH RATE IS LOW
•Low infant mortality rate
•High GDP
•High quality of life, such as access to health care, plentiful food supply and good water quality
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let’s practice drawing one together.
Age Male Female0-19 15 14
20-39 16 16
40-59 12 12
60 & Over 7 9
Australia
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Compare Schofield Barracks, Hawaii to Bella Vista, Arkansas. What are some potential reasons that might
cause the ages to be distributed in this way?
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World War I 1914-1918 1.7 million military dead
December 1934
Stalin began a period of purging and terror that lasted until 1939
and was marked by the execution of virtually the entire
political and military elite.
How old do you assume these people would have been in
1939?
Soviet Union
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Soviet Union
• How would you determine how World War I impacted the male population?
• What age group was impacted by Stalin’s purges?