Lesson objectives: To explain the influence of population momentum on projections of populations Key terms: Population projection Dependency ratio Elderly.

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Presentation transcript:

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 ? profile.com/data/ani_pop_1.htm

What is population momentum?

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

Population could grow to 15 billion /22/population-world-15bn-2100m /22/population-world-15bn-2100m What if population predictions are wrong? 011/sep/19/environment-population- forecasts-wrong 011/sep/19/environment-population- forecasts-wrong

Japan’s population to become extinct? regions/asia-pacific/japan/population-clock- shows-japan-faces-extinction-1000-years regions/asia-pacific/japan/population-clock- shows-japan-faces-extinction-1000-years Read and make notes

Costs and benefits? CostsBenefits

Youthful populations CostsBenefits

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]