Why is a common unit necessary while comparing population density?
A common unit like persons per square kilometre makes comparison clear. Exam tip: always check the unit.
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SubjectsGeography
जनसंख्या घनत्व
In this Class 9 Geography topic from the chapter Population, students learn how population density measures the number of people living in a unit area, usually per square kilometre. They explore the population-density formula, interpret maps and data, and compare densely and sparsely populated regions. The topic also explains how relief, climate, soil, water availability, transport, industries and employment influence settlement patterns and the distribution of population in India and around the world.
TOPIC PRACTICE
Up to 20 questions from this page. Select your focus, then start.
A common unit like persons per square kilometre makes comparison clear. Exam tip: always check the unit.
View question details382 is an average density not the actual density of every place. Exam tip: separate average and local variation.
View question detailsPopulation density and population distribution are related, but they answer different questions. Density is a numerical measure: it tells us the average number of people living in a unit of area, usually one square kilometre. Distribution is descriptive: it tells us where people live and whether they are evenly spread, clustered or concentrated in particular places. A map may show both, but the terms should not be treated as synonyms.
Option A is correct because it gives both meanings accurately. For example, two regions may have the same average density while one has people spread fairly evenly and the other has people concentrated in a few towns. Options B and C confuse population geography with unrelated subjects or processes. Option D is wrong because both density and distribution depend on area and location. The essential difference is numerical measurement versus spatial pattern.
High density means more people per area. Exam tip: connect density with per square kilometre.
View question details(6000 \div 30 = 200) so the density is 200 persons per square kilometre. Exam tip: simplify division carefully.
View question detailsAverage density may not show internal inequality within an area. Exam tip: check regional variation with average.
View question detailsDensity shows population pressure by considering area. Exam tip: remember the phrase per unit area.
View question detailsHigh density means more population per square kilometre. Exam tip: connect examples with concepts.
View question detailsIn inaccessible and sparsely settled areas people per square kilometre are fewer. Exam tip: remember examples of low density.
View question detailsIf population increases in the same area density rises. Exam tip: remember the relation of two components of density.
View question detailsDensity decreases when the same population spreads over a larger area. Exam tip: understand the effect of area increase.
View question detailsIn densely populated areas, a large number of people can create a bigger labour force and consumer market, increasing opportunities for jobs and business. However, the same concentration can put pressure on housing, water, transport, schools and health services. Option B is not a typical outcome of high population density. Exam tip: when writing about high density, include both an economic benefit and a public-service challenge.
View question detailsIn sparse population distance and access make service planning difficult. Exam tip: also write challenges of low density.
View question detailsDensity alone does not tell resource quality. Exam tip: read density with resource availability.
View question details(12000 \div 40 = 300) so density is 300 persons per square kilometre. Exam tip: check zeros and quotient carefully.
View question detailsThe meaning of darker shade is clarified by the legend. Exam tip: always check the legend while reading maps.
View question detailsPopulation density is calculated as total population ÷ total area. Dividing area by population reverses the ratio and does not give density. Using only urban population may also be inappropriate in a special case, but reversing the numerator and denominator is the most direct formula error. Exam tip: check that the final unit is persons per square kilometre.
View question detailsA density of 1000 persons per square kilometre is an average relationship between population and area. It does not say that the entire region contains only 1000 people. The region may cover many square kilometres, so its total population could be much larger. Density is useful for comparing how heavily different areas are populated, but it does not describe the exact location of every individual person within the area.
Option B is correct because it states that, on average, 1000 people live in each square kilometre. If the whole area had exactly 5 square kilometres and the average were uniform, the total would be about 5000 people; this shows why density is not the total population. Option A confuses density with total size. Option C mistakes the population figure for area, and option D wrongly treats it as the number of villages. The unit “persons per square kilometre” gives the clue.
Water scarcity and difficult living conditions reduce settlement in deserts. Exam tip: write water as a key reason.
View question detailsPopulation density shows how many people live in a given area. Densely populated areas generally place greater pressure on housing, drinking water, health centres, schools and transport, so planners use density to estimate resource needs. Option B is incorrect because services should be allocated according to local population and need, not equally everywhere. Exam tip: link population density with the planning of public facilities and resources.
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