Lesson objectives: To explain the influence of population momentum on projections of populations

Key terms: Population projection Dependency ratioElderly 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

What is population momentum?

Describe and explain the projections based on the information on

slide 4.

• Population could grow to 15 billion • 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

Japan’s population to become extinct?

• http://www.globalpost.com/dispatches/news/regions/asia-pacific/japan/population-clock-shows-japan-faces-extinction-1000-years

• Read and make notes

Costs and benefits? Costs Benefits

Youthful populations

Costs Benefits

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]