““Population Distribution & Population Distribution & Density”Density”

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Population Distribution Population Distribution & Density& Density

Global Geography 12 Global Geography 12

3 World Population Trends3 World Population Trends

1)1) The The world population is continuously growing largerworld population is continuously growing larger ..

2)2) There is a There is a growing gap between less developed countriesgrowing gap between less developed countries (LDCs) (LDCs) and and more developed countriesmore developed countries (MDCs): (MDCs):- In 1900: - In 1900: MDCs had 560 million people (34% of the world’s total population)MDCs had 560 million people (34% of the world’s total population)LDCs had 1.1 billion people (66% of the world’s total population)LDCs had 1.1 billion people (66% of the world’s total population)- In 1990: - In 1990: MDCs had 1.2 billion people (23% of the world’s total population)MDCs had 1.2 billion people (23% of the world’s total population)LDCs had 4.1 billion people (77% of the world’s total population)LDCs had 4.1 billion people (77% of the world’s total population)- In 2050: - In 2050: it’s estimated that over 84% of the world’s people will live in less developed it’s estimated that over 84% of the world’s people will live in less developed countries.countries.

3)3) UrbanizationUrbanization: the growing movement of people from rural to urban areas.: the growing movement of people from rural to urban areas.- 1800: 5% of the world lived in urban areas- 1800: 5% of the world lived in urban areas- 1998: 50% of the world lived in urban areas- 1998: 50% of the world lived in urban areas- 2011: over 50% of the world lives in urban areas- 2011: over 50% of the world lives in urban areas

Population DensityPopulation Density

The average number of people living The average number of people living in a particular unit of land; expressed in a particular unit of land; expressed as people per square kilometre as people per square kilometre (km2).(km2).

Arithmetic & Physiologic Population Arithmetic & Physiologic Population DensityDensity

Arithmetic Population Density:Arithmetic Population Density:This is technically the correct calculation though it may give This is technically the correct calculation though it may give an inaccurate impression.an inaccurate impression.

Ex. Ex. Population of CanadaPopulation of Canada = = 33 891 000 people33 891 000 people = approx. 3.68 people/km2 = approx. 3.68 people/km2

Canada’s Land Area Canada’s Land Area 9 220 970 km2 9 220 970 km2

Physiologic Population Density:Physiologic Population Density:This shows a more accurate and meaningful density figure. This shows a more accurate and meaningful density figure. It represents the number of people in a country relative to It represents the number of people in a country relative to the area of cultivated land.the area of cultivated land.

Ex.Ex. Population of Canada Population of Canada = = 33 891 000 people33 891 000 people = approx.74.5 people/km2 = approx.74.5 people/km2

Canada’s Cultivated Area 455 000 km2 Canada’s Cultivated Area 455 000 km2

Population DistributionPopulation Distribution

The location of a population and how The location of a population and how people are arranged on land.people are arranged on land.

** Population distribution is closely Population distribution is closely linked to water, physical geography, linked to water, physical geography, and economic or political heartlands.and economic or political heartlands.

Brazil’s Arithmetic & Physiologic Brazil’s Arithmetic & Physiologic Population DensityPopulation Density

Brazil’s (2010):Brazil’s (2010):population: 193 364 000population: 193 364 000area is 8 511 965 km2area is 8 511 965 km2area of its cultivated land approx. 595 area of its cultivated land approx. 595 838 km2 838 km2

ActivityActivity

Population Distribution & Density: ActivityPopulation Distribution & Density: Activity(Global Geography 12)(Global Geography 12)

China has a land area of approximately 9 600 000 km2 and China has a land area of approximately 9 600 000 km2 and approximately 1 449 600 km2 of cultivated land. As of approximately 1 449 600 km2 of cultivated land. As of 2010 China had a population of approximately 1 354 148 2010 China had a population of approximately 1 354 148 000 people. 000 people.

1) Calculate China’s arithmetic population density and 1) Calculate China’s arithmetic population density and physiologic population density. Show your work.physiologic population density. Show your work.

a) Arithmetic population density:a) Arithmetic population density:

b) Physiologic population density:b) Physiologic population density:

2) Why may it be useful to calculate the physiologic 2) Why may it be useful to calculate the physiologic population density of a country rather than using the population density of a country rather than using the arithmetic population density? Explain.arithmetic population density? Explain.

““7 Billion, National Geographic 7 Billion, National Geographic Magazine”Magazine”

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ReviewReview

Population TrendsPopulation Trends Population DensityPopulation Density 2 Types of Population Density2 Types of Population Density Population DistributionPopulation Distribution