1. Lesson objectives: To explain the influence of population momentum on projections of populations Key terms: Population projection Dependency ratio Elderly dependents Young dependents Ageing population Look at the animation of China’s population pyramid Identify elderly, youth, adult, gender differences, dependents, How does the population change over time ? http://www.china- profile.com/data/ani_pop_1.htm

2. What is population momentum?

3. Describe and explain the projections based on the information on slide 4.

4. Population could grow to 15 billion http://www.theguardian.com/world/2011/oct /22/population-world-15bn-2100m http://www.theguardian.com/world/2011/oct /22/population-world-15bn-2100m What if population predictions are wrong? http://www.theguardian.com/environment/2 011/sep/19/environment-population- forecasts-wrong http://www.theguardian.com/environment/2 011/sep/19/environment-population- forecasts-wrong

7. Japan’s population to become extinct? http://www.globalpost.com/dispatches/news/ regions/asia-pacific/japan/population-clock- shows-japan-faces-extinction-1000-years http://www.globalpost.com/dispatches/news/ regions/asia-pacific/japan/population-clock- shows-japan-faces-extinction-1000-years Read and make notes

8. Costs and benefits? CostsBenefits

9. Youthful populations CostsBenefits

10. PPQs 1.Define population momentum. [2 marks] 2.Discuss the problems that population momentum could cause in any country with high fertility rates in the immediate and long term future. [6 marks]