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What is the main difference between population growth and population density?

Answer and explanation

Correct answer: Population growth is the change in population over time, whereas population density is the number of people living per unit area.

Direct answer: Option A is correct. Population growth and population density both describe population, but they answer different questions. Growth asks, “How has the number of people changed over time?” Births, deaths, and migration can cause this change. Density asks, “How many people live in a given area?” It is commonly expressed as people per square kilometre and can be understood as population divided by area. Thus, time is the key idea for growth, while area is the key idea for density. Option A gives both definitions accurately. Option B reverses them. Option C is wrong because growth is not only births and density is not deaths; both may involve wider population information. Option D is wrong because growth is not only migration and density is not the total area itself. Memory cue: growth = change with time; density = people per area.

Related tags

Population GrowthPopulation DensityTimeAreaPopulationGeographyClass 9 Mcq

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