The document discusses population structure and how it can be analyzed using population pyramids. It explains that population structure looks at a country's population grouped by age and sex. Interpreting a population pyramid involves looking at recent birth rates at the base, life expectancy at the top, and any prominent age groups in the middle. It also introduces the dependency ratio, which compares economically active vs inactive portions of a population. The UK's population structure has changed from large families and high birth rates in the past to lower rates today, resulting in an aging population. Less developed countries typically have wider bases on their pyramids indicating high birth rates, while more developed countries have stabilized birth rates and more balanced age distributions.
4. Interpreting Pop Pyramids Start at the base – what has happened recently? Next go to the top – how long do people live for? Then look at the middle – are there any age groups that stand out? Long / short bars?
7. How has the population structure of the UK changed over time?
8. How has the population structure of the UK changed over time?
9. How has the population structure of the UK changed over time? Male Female Population in millions
10. How has the population structure of the UK changed over time?
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13. LEDW This country has a high BR – the pyramid has a wide base But it also has a high DR – shown by the steeply sloping pyramid
14. Falling BR In some LEDCs, the Government is encouraging families to have fewer children so the BR is falling – the base is becoming narrower.
15. MEDW Low DR – pyramid is wider at the top The largest group of people was born around 40 years ago – ‘baby boomers’. There are roughly the same amount of people in each age category – BR is stable. Male Female Population in millions
16. Declining population BR is falling – the number of people in each category is getting smaller In the future the elderly population will make up the largest section of the population – an ageing population
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