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?