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“Population Distribution & Density” youtube/watch?v=s9dFy6xBOBMPowerPoint Presentation

“Population Distribution & Density” youtube/watch?v=s9dFy6xBOBM

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### Population Distribution & Density

“Population Distribution & Density”http://www.youtube.com/watch?v=s9dFy6xBOBM

Global Geography 12

3 World Population Trends

1) The world population is continuously growing larger.

2) There is a growing gap between less developed countries (LDCs) and more developed countries (MDCs):

- In 1900:

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)

- In 1990:

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)

- In 2050:

it’s estimated that over 84% of the world’s people will live in less developed countries.

3) Urbanization: the growing movement of people from rural to urban areas.

- 1800: 5% 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

Population Density

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

Arithmetic & Physiologic Population Density

Arithmetic Population Density:

This is technically the correct calculation though it may give an inaccurate impression.

Ex.

Population of Canada = 33 891 000 people = approx. 3.68 people/km2 Canada’s Land Area 9 220 970 km2

Physiologic Population Density:

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

Ex.

Population of Canada = 33 891 000 people = approx.74.5 people/km2 Canada’s Cultivated Area 455 000 km2

Population Distribution

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

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

Brazil’s Arithmetic & Physiologic Population Density

Brazil’s (2010):

population: 193 364 000

area is 8 511 965 km2

area of its cultivated land approx. 595 838 km2

Population Distribution & Density: Activity(Global Geography 12)

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

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

a) Arithmetic population density:

b) Physiologic population density:

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

“7 Billion, National Geographic Magazine”http://www.youtube.com/watch?v=sc4HxPxNrZ0

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