Indezine Template

Population

What ways can we look at population?
Cultural backgroundAgeSexGeographic locationNative statusDiseases

Why study populations?
The reason we study various populations is so we can answer questions like these:

Why are more schools closing than opening? Why will you likely have to work more years than your parents before retiring? Why are old rock-and-roll groups, such as the Rolling Stones, still so popular?

The percentage of one of these two age groups is increasing. Which one?

Our 2 Ways
We will look at population in 2 ways:

Age/Gender &Geographic

Population Pyramids
Age/Gender

Population Pyramids
A method that uses graphs to make statistical data easier to understand

A graph that depicts population distribution by age and sexFemales on the right

and males on the left

Both sides show the percentages of people in each age group.

The Study of Populations
Putting the two sides together can allow you to easily compare a countrys population for different years (or to compare different countries).

How to arrange the graphs
Different Ages/RolesDemongraphers have identified three important stages of our lives in which we have different rolesStage 1: Children (up to age 14)Stage 2: Working Adults (ages 15-64)Stage 3: Older Adults (age 65 and over)

This model assumes that children and older adults are not working and must be supported by the working population

Dependency Load
the part of the population that needs to be supported. It is made up of two components: the 014 age group and the 65+ age group.

Dependency Load
The portion of the population that is not in the work force

What is the effect of a high dependency load? Great deal of pressure on the society to provide education, housing, health care, old-age homes and other needs

The Study of Populations
What has happened to the dependency load between 1956 and 2004?What is the significance of this change?

The Study of Populations
Populations within countries change over time in a predictable manner as they become more industrialized.This is called the Demographic Transition Model as was created by Thomas Malthus.

The Study of Populations
What is happening at each stage?Why is it happening?

The Study of Populations
A specific pattern of population growth has occurred in many developed nations during the past 60 years.
1945
1965
1985
2005
2025
Births
Baby Boom
Generation X
Baby Echo
Generation Y

Making a Population Pyramid

Rules
Males on the left, females on the rightAge is grouped in cohorts (sets of numbers) ex. 0-4, 5-9 and numbers do not overlapAge increases towards the top (oldest at top)The scale for males must be the same as the scale for femalesThe scale at the top of the pyramid can show either population or percentageLabel all axes (including units of measure)Include a title complete with date of pyramid and locationUse different colour for males and females

Lets make the pyramid