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Why is a time period important in population change?

Answer and explanation

Correct answer: Because change is measured over a period

Direct answer: A, because change is measured over a period. A population number has meaning only when we know when it was counted and how it compares with another time. For example, planners may compare the population at the beginning and end of one year, ten years, or the period between two censuses. We can begin with the starting population, add births and in-migration, subtract deaths and out-migration, and then compare the result. Without a time period, “the population increased by 500” is incomplete: the increase might have happened in a month or many years. B, C and D are unrelated statements about physical objects and do not explain demographic measurement. Memory cue: change always needs a “from when to when” comparison.

Related tags

Processes Of Population ChangePopulationGeographyClass 9 Mcq

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