Population: Canada and the World. Population Change Equation Births – deaths + immigrants – emigrants = increase or decrease in population.

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Presentation transcript:

Population: Canada and the World

Population Change Equation Births – deaths + immigrants – emigrants = increase or decrease in population

Population Pyramid Graph – age and sex structure of a population “cohorts” – intervals of 5 years

4 Pyramid Models 1)Early Expanding – high birth rate, high death rate, low life expectancy

2) Expanding – high birth rate, lower death rate, higher life expectancy

3) Stable – generally, the number of youth equals the number of older people

4) Contracting – larger numbers of older people than younger (greying population

An animated pyramid of Canada recensement/2006/as-sa/ /vignettes/cda06pymd.swf recensement/2006/as-sa/ /vignettes/cda06pymd.swf

China’s Population Pyramid

Animated China Pyramid od/data/anim od/data/anim /pop_ani.htm

Population Distribution

The numbers are not good... 35% of the world’s land = not good for settlement Over 50% of world’s pop. lives on only 5% of the land 90 % live on 20 % of the land 2/3rds of people live within 500 km of the ocean

Population Density

If the world had only 100 people...

Physical factors affecting population density Climate

Landscape

Resources

Soils

Vegetation

Water

accessibility

Can you think of 5 HUMAN factors affecting population density? 1)Govt. Policies 2)Disease 3)Development 4)Culture 5)Communication