1. Demographic
Transition
Model

2. A. Identify and provide an example for 3 types of diffusion
B. Identify the type of diffusion a zombie apocalypse would be. Explain the process of diffusion in this instance
C. Explain the effects of a zombie apocalypse on the cultural landscape

3. AIM: How does a country progress through the DTM?
DO NOW: Predict: what factors lead to a stable population? What factors lead to an unstable population?
Learning Objectives:
Describe the 5 stages of the DTM
Identify countries in each stage of the DTM
Evaluate the factors which allow a country to reach a new stage of the DTM

4. Population Change in England and Wales 1700-2000

5. Natural increase is the balance between birth rates and death rates
Population Change
Outputs
Inputs
Deaths
Births
Natural Increase
Total
Population
Emigrants
Immigrants
Migration
The total population of an area is the balance between 2 forces of change: natural increase and migration
Natural increase is the balance between birth rates and death rates

6. World Population Changes

7. Global Natural Increase

8. Doubling Time
This map shows how long it will take for countries to double their population if it continued to grow at the present rate

9. Demographic Transition Model
Stage 1
Stage 2
Stage 3
Stage 4
Stage 5 ?
Total
Population
Natural
Increase
In Population
Natural
Decrease
In Population
Birth Rate
Death Rate

10. Stage 1 High Fluctuating
Low population
Increasing very slowly
High birth rate
High death rate
Tribes (Amazonia)
UK: pre-1780
Stage 1
Birth Rate
Death Rate
Total
Population

11. Stage 2 Early Expanding Population growing at faster rate
High but decreasing birth rate
Decreasing death rate
Sri Lanka/Bolivia
UK:
Birth Rate
Death Rate
Total
Population

12. Stage 3 Late Expanding
Stage 3
Population still increasing, but rate of increase slowing down
Decreasing birth rate
Low death rate
Uruguay/China
UK:
Total
Population
Birth Rate
Death Rate

13. Stage 4 Low Fluctuating High population, almost stable Low birth rate
Low death rate
Canada/USA
UK: post-1940
Total
Population
Birth Rate
Death Rate

14. Many Stage 4 countries are experiencing a condition known as Zero Population Growth (ZPG). This is when birth rates are equal to death rates.
A TFR of 2.1 produces ZPG.​

15. Demographic Transition Model
Stage 1
Stage 2
Stage 3
Stage 4
Total
Population
Natural
Increase
In Population
Natural
Decrease
In Population
Birth Rate
Death Rate
Amazonian Tribes
UK:
pre-1780
Sri Lanka/
Bolivia
UK:
Uruguay/
China
UK:
Canada/
USA
UK:
Post-1940

16. What do you think the reasons are for the changes at each stage?

17. Reasons for Stage 1 High Fluctuating
Little access to birth control
Many children die in infancy so parents have more to compensate
Children are needed to work on the land
Some religions encourage large families
Death rates are high due to disease, famine, poor diet, poor hygiene, little medical science
Stage 1
Birth Rate
Death Rate
Total
Population

18. Reasons for Stage 2 Early Expanding
Improvements in medical care
Improvements in sanitation and water supply
Quality and quantity of food produced improves
Transport and communications improve movements of food and medical supplies
Decrease in infant mortality
Birth Rate
Death Rate
Total
Population

19. Reasons for Stage 3 Late Expanding
Increased access to contraception
Lower infant mortality rates so less need for bigger families
Industrialisation and mechanisation means fewer labourers required
As wealth increases, desire for material possessions takes over the desire for large families
Equality of women means they can follow a career rather than just staying at home
Stage 3
Total
Population
Birth Rate
Death Rate

20. AIM: Is the DTM valid?
Do Now: How do we move from stage 1 to stage 2? How do we move from stage 2 to stage 3?
Objectives:
SWBAT describe the 5 stages
SWBAT evaluate the accuracy of the DTM by considering it’s merits and limitations
SWBAT accurately depict and describe a family in a respective stage of the DTM

21. Reasons for Stage 4 Low Fluctuating
Rates fluctuate with ‘baby booms’ and epidemics of illnesses and diseases
Reasons for Stage 3 have improved and it stabilises
Total
Population
Birth Rate
Death Rate

22. Stage 5: Declining (or Depleting) Population
Is there a Stage 5? ? ? ?
Stage 5: Declining (or Depleting) Population

23. Stage 5 DESCRIPTIONS REASONS??? CDR larger than CBR
Very developed countries
“graying populations”
High dependency ratio
EX: Germany, Japan, Russia, Bulgaria, Italy
REASONS???
Same as stage 4
Rise of DINKs
More secular: contraception is not taboo

24. JAPAN is the ultimate example of a State 5 country. ​
As Japan has become more developed, its people have had ever fewer children; today, its population is in decline. ​
The population will decline from 127 million (2010) to 95 million (2050) unless rates change​
By 2050, most of Japan’s pop’n will be over 50 years old- a dependency ratio nightmare!​

25. AIM: How does an aging population affect a country?
Do Now: Get out the chart from Friday and complete the questions with a partner
HW: Project Due Thursday
Learning Objectives:
Describe the limitations of the DTM
Construct a FRQ evaluating the effects of an aging population on a country
Analyze global demographic and resource data

26. What limitations do you think there could be with the model?
It does not include the influences of migration
It assumes that all countries will go through the same pattern
There is no time scale
Reasons for birth rates and death rates are very different in different countries
And finally, is there a stage 5?

27. DTM Families Activity Illustrate and name your family
Where do they live?
What are their living conditions like? How do they make earn a living? What types of resources do they have?
What is going on with the total population around them? Why?
Use VOCAB: CBR, CDR, IMF, LDC, MDC,etc

28. The End?