1. How can we show different population structures?
13 September 2018
How can we show different population structures?
Learning Objectives: To understand the link between demographic factors and how this can be applied to population pyramids and the DTM.
Learning Outcomes: Essential will understand the link between population pyramids and the DTM
Stretch will apply their knowledge to create a population pyramid
Challenge will be able to explain the reasons for a countries pyramid shape.

2. STARTER
In pairs you have two minutes to copy the four enquiry words and under each create a list of factors causing it.
Take it in turns in silence to write one word at a time.
Rally Table
Narrow base (low birth rate)
Wide base (high birth rate)
Narrow apex (low life expectancy)
Wide apex
(high life expectancy)

3. What 3 things should you look at when interpreting population pyramids?
APEX
SIDES
BASE

4. What do these three things show us?
Life expectancy
Number of older people in the population
Apex
Sides
Concave = high DR
Convex = low DR
Base
Current BR

5. DTM THINK! Base – Sides – Apex! Your task: Get into the 5 teams.
You are going to be given one of the stages on the DTM and build a pyramid to represent it!
Team 1:
Team 2:
Team 3:
Team 4:
Team 5:
10 Minutes
THINK!
Base – Sides – Apex!

6. Next:
1 - Write a brief DESCRIPTION of your pyramid (base, sides and apex)
2 – EXPLAIN why your pyramid looks like this (what is happening at this stage of the DTM?)
Be prepared to present your pyramid and explanation to the rest of the class! 

7. The composition of a population according to age groups and gender is known as the age-sex structure.
This is represented by the population pyramid
Population pyramids can show:
1 – results of births minus deaths in specific age groups
2 – effects of migration
3 – effects of events such as war, famine and disease
4 – indication of the overall life expectancy of a country
Age structure indices
dependency ratio - ( and over/15-64) x 100
support ratio – inverse of the dependency ratio
juvenility ratio /over 20’s x 100
old-age index – 60’s and over/20-59 x 100

8. 2. Migration of male workers out of area
Now for some tricks!
Change your pyramids according to the following situations:
1. War
2. Migration of male workers out of area
3. Economic crisis
4. Rural area
5. Urban area

9. Your task:
On you’re A4 sheet you have 4 pyramids and a blank box
1 – Label each pyramid the correct stage of the DTM
2 – In the blank box draw a pyramid for the missing stage
3 – Annotate the pyramids to describe what they show (sides, base and apex!)

10. Complete the exam question
Your task:
Complete the exam question
8 Minutes

11. Peer assessment

12. Plenary Which pyramid A or B?
Lets
test our
understanding!
Write the numbers 1-15 in the margin in the back of your book… get ready! B A

13. 1. In Stage 4 of the DTM? B A

14. 2. Has a high life expectancy?B A

15. 3. Reflects the population structure of an LEDC.B A

16. 4. Is in Stage 1 of the DTM B A

17. 5. The majority of the people live in urban areas.

18. 6. Has a high birth rate B A

19. 7. May soon enter a time where the population starts to decline.B A

20. 8. Grandparents are rare B A

21. 9. Slow population growthB A

22. 10. Better medical facilities

23. 11. Very limited access to contraception.B A

24. 12. Many children need to work on the landB A

25. 13. Low death rate B A

26. Homework: Due Thursday 20th October
Population Structure: Complete the question in the booklet. All the information is available in the booklet. Any problems please come and see me before the deadline for help.