Transcript Population pyramids

Essential Question
•How do you interpret
a population
pyramid?(7.3.21)
What percentage of the population do you
represent in this graph?
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 STRUCTURE
The population pyramid displays the age
and gender structure of a country or given area
Population in
Five Year
Age bands
MALES
To the left
FEMALES
To the right
Usually, but not always,
Given in a percentage to make for easier
comparisons
between countries
Population pyramid of a less developed nation
Population Pyramid of Nigeria (1995)
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.
Population pyramid of a developed nation
Population Pyramid of Sweden (1995)
Interpret a Population Pyramids
A 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.
Australia
Age
Male
Female
0-19
15
14
20-39
16
16
40-59
12
12
60 & Over
7
9
Compare Schofield Barracks, Hawaii to Bella Vista,
Arkansas. What are some potential reasons that might
cause the ages to be distributed in this way?
Soviet Union
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
• How would you
determine how
World War I
impacted the male
population?
• What age group was
impacted by Stalin’s
purges?