Upcoming SlideShare
×
Like this presentation? Why not share!

Like this? Share it with your network

Share

# Population Structure

• 2,873 views

• Comment goes here.
Are you sure you want to
Be the first to comment

Total Views
2,873
On Slideshare
2,868
From Embeds
5
Number of Embeds
3

Shares
65
0
Likes
2

### Embeds5

 http://ashumangeography.blogspot.com 2 http://www.slideshare.net 2 http://www.ashumangeography.blogspot.com 1

### Report content

No notes for slide

### Transcript

• 1. Population Structure
• 2. Learning Objectives
• Interpret the age-sex structure of a country from a population pyramid
• Describe how and explain why the UK’s population structure has changed
• Make links between the DTM and population structure
• Compare population pyramids from the LEDW and MEDW
• 3. Population Structure
• Population structure is the make up of the total population in a country or area where people are grouped by age and sex.
• The graphical technique used to summarise age structure is the population pyramid.
• 4. Interpreting Pop Pyramids Start at the base – what has happened recently? Next go to the top – how long do people live for? Then look at the middle – are there any age groups that stand out? Long / short bars?
• 5. Dependent Population
• 6. Dependent Population
• The dependency ratio is directly linked to a country’s age structure.
• To calculate it, the population is split into economically active (15-64) and inactive (0-14 and 65+)
• Dependency ratio is calculated as a % using:
Number of economically active Number of non-economically active X 100
• 7. How has the population structure of the UK changed over time?
• 8. How has the population structure of the UK changed over time?
• 9. How has the population structure of the UK changed over time? Male Female Population in millions
• 10. How has the population structure of the UK changed over time?
• 11. Population Structure of the UK
• Write a case study to describe how and why the population structure of the UK has changed from 1841-1981.
• P172-173
• 12. MEDW vs LEDW
• The shape of a population pyramid gives a clear indication of the development status of a country and can therefore be linked with countries in the MEDW or the LEDW.
• 13. LEDW This country has a high BR – the pyramid has a wide base But it also has a high DR – shown by the steeply sloping pyramid
• 14. Falling BR In some LEDCs, the Government is encouraging families to have fewer children so the BR is falling – the base is becoming narrower.
• 15. MEDW Low DR – pyramid is wider at the top The largest group of people was born around 40 years ago – ‘baby boomers’. There are roughly the same amount of people in each age category – BR is stable. Male Female Population in millions
• 16. Declining population BR is falling – the number of people in each category is getting smaller In the future the elderly population will make up the largest section of the population – an ageing population
• 17. MEDW vs LEDW Male Female Population in millions
• 18. Population Structure and the DTM
• The shape of a population pyramid gives a clear indication of the development status of a country and can therefore be linked with a particular stage of the DTM
• http://www.bbc.co.uk/scotland/education/geog/population/
• 19. Activity
• Using P174-175
• Sketch population pyramid for each stage of the DTM
• Give reasons for the changes
• 20.