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Why is it important to understand what the population structure is of different countries?. How do population pyramids help us learn about population?. How can we draw a population structure graph showing gender for a country?. POPULATION STRUCTURE The population pyramid displays the age - PowerPoint PPT Presentation
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Why is it important to understand what the population structure is of
different countries?
How do population pyramids help us learn
about population?
How can we draw a population structure graph showing gender for a country?
POPULATION STRUCTUREThe population pyramid displays the age and sex structure of a country or given area
Population inFive YearAge bands
Usually, but not always,In % to make for easiercomparisonsbetween countries
OLD DEPENDANTS
ECONOMICALLYACTIVE
YOUNG DEPENDANTS
FEMALESTo the rightMALES
To the left
UK Population PyramidWhat does it
show?
Why is it this shape?
Urban & Rural Pyramids
Slow and negative growth Turn to p140 in Evolving Planet
Draw the UK’s population PyramidAge Range Males Females
0 - 4 3 2.7
5 - 9 3.2 3.2
10 - 14 3.8 3.4
15 - 19 3 2.8
20 - 24 2.8 2.8
25 - 29 2.6 3.4
30 - 34 2.8 3.8
35 - 39 3.4 3.9
40 - 44 4.2 3.4
45 - 49 3.6 3
50 - 54 3.8 3.3
55 - 59 3 3
60 - 64 2.5 2.6
65 - 69 2.4 2.3
70 - 74 2 2.1
75 - 79 1.6 2
80 - 84 1 1.8
85 - 89 0.2 1
90 and over 0.1 0.5
Use this data to draw a population pyramid for the UK – it is based on the most recent census data (2001).
How can you read a population pyramid? COPY THIS DOWN INTO YOUR
BOOKLETS!
Population pyramid for Calcutta
• Complete task 4b on p11 of your booklets
What do population pyramids look like for different stages of the DTM?
Stage 5?
• Which population pyramid is for Germany, Kenya and USA?
Population Pyramids
LEARNING OBJECTIVES1. Be able to annotate population pyramids
2. Distinguish between an MEDC and a LEDC
What do they show?
• Sex-ratio: the amount of males to females in a location
Males are shown on the left.
Females are shown on the left.
What do they show?
Age distribution of a country
Age categories split into 5 year stages
• Dependent Population: The population under the age of 15 and over 65
What do they show?
Children 0-14 years of age
Elderly population 65+ years of age
• Economically Active: 15-60 years old who have the potential to contribute economically
What do they show?
Workforce
What do they show?
In this country
there is a high Birth
Rate
There is also a high
Death Rate.
What should you annotate?
Sex-ratio: what is the male/female
ratio
Birth Rate: Is the BR increasing or
decreasing
Dependency Ratio
• The dependency ratio can be expressed as:
Population( u14 + 65+) X 100
Population 15-65
