Obj. 1.9 Interpret patterns and processes at different scales September 19, 2017 Obj. 1.9 Interpret patterns and processes at different scales

Distribution and Density

Distribution •Everything on the Earth’s surface has a physical location and is organized in space

Density •Density is how often an object occurs within a given area or space

Population Density Looks at how many people occupy a given amount of space

Population Density at Various Scales The population of Canada is about 35,000,000 The area of Canada is 3,855,000 sq miles This makes the population density about 8 people per square mile

Population Density at Different Scales The population of Ontario is about 13 million. The area of Ontario is 415,000 sq miles. The population density is about 31 people per sq mile. The population of Nunavut is about 35,000. The area of Nunavut is 808,000 sq miles. The population density is .04 people per square mile.

Why is population density misleading?

Physiological Density •Refers to the number of people divided by the arable (farmable) land

Comparative Physiological Densities Japan: Population Density: 868 people per square mile Physiological Density: 7,593 people per square mile https://www.youtube.com/watch?v=o9Xg7ui5 mLA Australia: Population Density: 8.5 people per square mile Physiological Density: 107 people per square mile https://www.youtube.com/watch?v=vUF7ja9ehI s

Agricultural Density •Agricultural density is the amount of arable land divided by the number of farmers in a given area

Calculating Agricultural Density The Netherlands Population Density: 1, 070 people per sq mile Total number of farmers: 211,000 Total Land: 16,033 sq miles Arable Land: 55% What is the agricultural density of the Netherlands? The United States Population Density: 86 people per square mile Total number of farmers: 3,200,000 Total Land: 3,796,742 sq miles Arable Land: 44% What is the agricultural density of the United States?

Age-Sex Pyramids

Age-Sex Pyramids

Age-Sex Pyramids at Different Scales The United States-2016 Lawrence, Kansas-2014

Questions Please answer the following questions in your notebook. Which measure of density is the most informative for Geographers? What would an age-sex diagram of Sun City, Arizona look like? (It is a senior citizen community)