why is it important to understand what the population structure is of different countries?
DESCRIPTION
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 PresentationTRANSCRIPT
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