Bell work 10-11-11The political cartoon depicts population
growth over the past two thousand years.
Which statement best describes this illustration?
a. Human population has decreased gradually since 1800.
b. Human population has increased gradually since 1800.
c. Human population has decreased rapidly since 1800.
d. Human population has increased rapidly since 1800.
D is the correct answer.
Explain why?
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
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
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.
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
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
Compare Schofield Barracks, Hawaii to Bella Vista, Arkansas. What are some potential reasons that might
cause the ages to be distributed in this way?
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
Soviet Union
• How would you determine how World War I impacted the male population?
• What age group was impacted by Stalin’s purges?