2 What is a population pyramid? A diagrammatic representation of the age and sex composition of a population.Allows you to analyze trends in birth & death rates, fertility rates, infant mortality rates, life expectancy as well as in similarities and differences in gender.Helps to make predictions about future growth or decline.Can give insight to the status of a particular country (core, periphery, semi-periphery).Is really two bar graphs, one male and one female, back to back.
5 Analyzing population pyramids By only the shape of the population pyramid, you can make predictions about a country’s future growthThere are five general shapes to look for:UnstableExpandingStableStationaryDeclining
6 Unstable Population High birth & death rates Low life expectancy Brings a countries medical system or political system into questionlack of contraceptiveslack of medical treatmentConsider: Infant Mortality RateWar? Disease?
7 Expanding Population High birth rates Death rates a bit lower, life expectancy starting to improveSuggests a decent medical systemExpect the country’s population to increase rapidlyLots of young people, not many elderly peopleMedical improving, nutrition improving, standard of life improving
8 Stable Population Slow growth Low birth & death rate High life expectancyBirth rate > Death rateSuggests a good medical system: availability of contraceptives and medical treatmentIncomes increasing, standard of living increasing, children are becoming more of an expense
9 Stationary / Slow Growth Population All age groups similarBirth & death rates lowLife Expectancy highLess and less babiesNo growthBirth rate = death rate
10 Declining PopulationNo country has reached this stage yet, therefore this pyramid represents a prediction of future trendsLow birth & death rateHigh Life ExpectancyDeath rate > Birth rate
11 Canada’s Population Pyramid *What can we decipher about Canada’s population from this pyramid? Which of the five classifications might we give to Canada?How did our population pyramid reach this shape?Germany
12 Analyzing Pyramids classification? death rate? birth rate? Afghanistan 2009classification?death rate?birth rate?life expectancy?predicted growth?periphery, semi-periphery or core?
13 Analyzing Pyramids classification? birth rate? death rate? United Kingdom 2009classification?birth rate?death rate?life expectancy?infant mortality?predicted growth?periphery, semi-periphery or core?
14 Analyzing Pyramids classification? birth rate? death rate? Brazil 2009classification?birth rate?death rate?life expectancy?infant mortality?predicted growth?periphery, semi-periphery or core?