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Human Geography. Population Distribution, Density, Dependency Ratio, and Pyramids. April 15, 2014. World Population Growth: Is it Sustainable?. What is it?. Population Distribution. A Population Distribution shows the arrangement of people in a given space .

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human geography


Population Distribution, Density, Dependency Ratio, and Pyramids

April 15, 2014

population distribution

What is it?

Population Distribution

A Population Distribution shows the arrangement of people in a given space.

World population distribution is uneven.

Places such as Antarctica or the Canadian Arctic are less habitable and thus, sparsely populated.

Places such as Europe or Canada’s Southern Border offer warmer temperatures, and are thus more densely populated.

population density
Population Density

What is it?

  • Population density is the number of people per unit of area, usually quoted per square kilometer.
  • Population densities can be calculated for towns, cities, provinces, countries, continents, or the entire world!

In comparison…. World population density = 53 people per square kilometer

Canadian population density = 3.5 people per square kilometer

world population density
World Population Density

# of people per km2

british columbia population density

What are the most densely populated areas in BC?

what is a population pyramid
What is a population Pyramid?

A visual representation of a population structure

  • It is a graph that displays a population's age and gender composition
  • Shows number or percentage of males and females in each age group (cohort)
  • Represents a country’s birthrate and death rate
  • Represents population growth or decline
population pyramids 101
Population Pyramids 101

Vertical Axis - Age Groups

Elderly dependents

Working population

Young dependents

Horizontal Axis – Percentage / number



To the right


To the left

The population pyramid displays the age

and gender structure of a country or given area

Population in

Five Year

Age bands

Usually, but not always,

Given in a percentage to make for easier

comparisons between countries

population pyramid of a developing nation
Population Pyramid of a Developing Nation

Population Pyramid of Nigeria

interpreting population pyramids
InterpretingPopulation Pyramids…
  • Birth rate is high and Death rate is high
  • High Infant mortality rate
  • Low Standard of Living (low income, poor medical care, inadequate food supply or poor water quality).
population pyramid of a developed nation
Population Pyramid of a Developed Nation

Population Pyramid of Sweden

interpreting population pyramids1
InterpretingPopulation Pyramids…
  • Birth rate is low and Death rate is low
  • Low infant mortality rate
  • High quality of life (high income, access to health care,plentiful food supply and good water quality)
each pyramid tells a story about the past present future of a country its people

Why are Population Pyramids Important?

Each pyramid tells a story about the past, present & future of a country & its people.

Allow easy comparison between population structures

Assist in Policy Planning

future housing estates

future schools

future jobs

review population pyramids worksheet
Review: Population Pyramids Worksheet

A. Drawing a Population Pyramid



review population pyramids worksheet1
Review: Population Pyramids Worksheet

B. Analyzing a Population Pyramid

2. Which age-sex groups are the largest and smallest?

Largest Age-Sex Group: Male, age 50-54 = 3.9%

Smallest Age-Sex Group: Male, age 95+ = 0.03%

3. Compare the percentage of males and females age 70+

There are more females because females live longer.

4. What noticeable/outlying age-sex groups can you identify and what historical events can their significance be attributed to?

High Population aged 45-60 = THE BABY BOOMERS

(born 1950s and 1960s)

High Population aged 20-35 = THE BABY BOOM ECHOERS

(born 1970s and 1980s)

age structure of population
Age Structure of Population
  • The age structure of a population helps us understand the reasons for population change
  • Populations divided into:
    • Children up to age of 15
    • Working adults from age 16-64
    • Adults age 65 and older
  • This gives the dependency ratio, or proportion of the population being supported by the working age group
age structure of canada
Age structure of Canada
  • Children and older people put pressure on society for:
    • Medical, education, housing, etc
  • 1996: Canada population included:
    • 21% children, 12% older adults, so…
    • Dependency ratio of 33%
  • This means one in every three people in Canada isn’t earning their own money
How does the population of Canadian Aboriginals compare to that of Non-Aboriginals? Why do you think this is the case?

Think, Pair, Share!!!

examining aboriginal demographics
Examining Aboriginal Demographics
  • A Small and Diverse Population
  • According to the 2011 Census, there was a total of 1,400,685 Aboriginal people in Canada, comprising 4.3% of the Canadian Population
examining aboriginal demographics1
Examining Aboriginal Demographics
  • A Very Young Population
  • The Aboriginal population is much younger than the non-Aboriginal pop.
  • In 2006, 48% of the Aboriginal population was under the age of 25 compared with 31% of the non-Aboriginal population
  • In 2011, the average age of
  • the Aboriginal population was
  • 27.7 years of age, compared
  • with 40.6 years of age for
  • non-Aboriginal people.
examining aboriginal demographics2
Examining Aboriginal Demographics
  • A Fast Growing Population
  • Canada's Aboriginal population is growing faster than the general population, increasing by 20.1% from 2006 to 2011
  • This is due to a
  • higher fertility rate
  • among Aboriginal
  • women than among
  • other Canadian
  • women.