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In which situation will the effect of population growth on population density be clearest?

Answer and explanation

Correct answer: When the area remains the same and the population increases

The correct answer is B: when the area remains the same and the population increases. Population density tells us how many people live in a unit of area, commonly people per square kilometre. The formula is density = population ÷ area. If the area remains fixed, any increase in population directly raises the density. For example, 1,000 people in 10 square kilometres gives 100 people per square kilometre; if the population becomes 2,000 while the area stays 10 square kilometres, density becomes 200. A is less clear because a rapidly increasing area can offset some population increase. C generally lowers density if area is unchanged. D gives zero density, not an effect of population growth. Memory cue: fixed denominator plus a larger numerator means a larger density.

Related tags

Population DensityPopulation GrowthAreaPopulationGeographyClass 9 Mcq

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