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Decadal population growth shows change over which period?

Answer and explanation

Correct answer: Ten years

The direct answer is C: ten years. The word decadal comes from a term meaning ten, so a decadal measure covers a period of ten years. To study decadal population growth, compare the population at the beginning of a decade with the population at its end, and then calculate the change or growth rate. Option A is wrong because one year is an annual period. Option B is wrong because five years is a five-year period, not a decade. Option C is correct because one decade equals ten years. Option D is wrong because twenty years covers two decades. Memory cue: annual means one year, decadal means ten years, and a twenty-year period contains two decades.

Related tags

Decadal GrowthTime PeriodPopulation GrowthPopulationGeographyClass 9 Mcq

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