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Why is it wrong to ignore base population in analysing population growth?

Answer and explanation

Correct answer: Because the same percentage gives a different absolute increase on different bases

The direct answer is A. Base population means the starting number of people on which a percentage is calculated. The same rate can produce very different numerical increases: 10% of 1,000 is 100, whereas 10% of 10,000 is 1,000. Thus, a rate alone does not tell us the full size of the change. Option A is correct because it distinguishes relative growth, expressed as a percentage, from absolute growth, expressed as a number of people. Option B is wrong because area is the land surface, while base population is a number of persons. Option C is wrong because percentages are useful for comparing places of different sizes, provided the base is also considered. Option D is wrong because births and deaths are important components of population change. Memory cue: percentage tells how fast; base population tells how large the numerical effect may be.

Related tags

Base PopulationPercentageAbsolute GrowthPopulation GrowthPopulationGeographyClass 9 Mcq

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