1. Population size and structure

2. Population growth in MEDNs and LEDNs
Less economically developed nations
More economically developed nations

3. Prospects for growth in world population

4. Manipulating population data

5. Population data for the UK and Hong Kong, 1999
Use the table below to calculate the RNI for the UK and Hong Kong
Which would have the shortest doubling time
Explain why RNI figures may be an inaccurate measure of the growth rate for a population
Population data for the UK and Hong Kong, 1999
Country
Total population
Births
(per 1000 per year)
Deaths UK
59.4 million 12 10
Hong Kong
6.9 million 9 5

6. Use the table below to calculate the RNI for the UK and Hong Kong
Births – deaths = increase
RNI UK – 10 = 2 per 1000
= 0.2% increase
RNI Hong Kong – 5 = 4 per 1000
= 0.4% increase

7. Which would have the shortest doubling time?
Hong Kong because it has a higher RNI

8. Explain why RNI figures may be an inaccurate measure of the growth rate for a population
RNI figures do not allow for:
Immigration
Emigration
Sudden changes in birth rate
Sudden changes in death rate

9. Survival curves for MEDNs and LEDNs
Calculate average life expectancy (MEDN and LEDN) from the graph
LEDN = 54 years
MEDN = 74 years

10. Structure of MEDN and LEDN populations

11. Past, present and future population trends
The average world rate of population growth is 1.4%
However, there is great variation from country to country

12. Growth rate and doubling time
Location
Growth rate (% Yr-1)
Doubling time (Yr)
World
1.4 49
Central and South America
1.8 38
Africa
2.5 28
Asia
1.5 46
Northern Europe
0.1
541
Australia
0.7
107
North America
0.6
119
Describe the relationship between growth rate and doubling time.
As the growth rate increases, doubling time decreases

13. Demographic transition model

14. Demographic pyramids for the demographic transition model
Stage 3
Stage 2
Stage 4
Stage 1

15. Student exercise
1) Describe the changes in birth rate and death rate and population growth in Sweden and Sri Lanka since 1900
2) In which stage of the demographic transition model was each country in the year 2000?

16. 1) Describe the changes in birth rate and death rate and population growth in Sweden and Sri Lanka since 1900
Sweden: the general trend is a decline in both birth rate and death rate since 1900
Sri Lanka: , birth rate increased, birth rate fluctuated, 1960 onward birth rate has declined. The death rate increased to 1920 and has generally declined since.
Birth rates exceed death rates in Sri Lanka, so its population continues to grow rapidly. In Sweden, death rates have exceeded birth rates since about 1995, so the total population is decreasing.

17. 2) In which stage of the demographic transition model was each country in the year 2000?
Sweden is in stage 4 of the demographic transition model, entering stage 5
Sri Lanka is in stage 3

18. Social conditions affecting population structure
Food supply
Sewage disposal
Drinking water supply