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GeographyMediumAsked in: CDS · CDS-I 2023, GK

Meena wants to show diagrammatically how two sets of data, namely, population size and number of services are related to each other. Which one of the following will be the most suitable for the presentation?

  1. A.Pie chart
  2. B.Scatter graph
  3. C.Bar chart
  4. D.Triangular graph

Correct answer

B. Scatter graph

Explanation

The correct answer is B, Scatter graph. A scatter graph is the right diagram when the aim is to show how two sets of data are related to each other. In a scatter graph each place, such as a town, is plotted as one dot, with one variable (here population size) on the x-axis and the other (the number of services) on the y-axis. The pattern of dots then shows the relationship: dots rising from left to right show a positive correlation, which is what geographers expect, since larger settlements usually offer more services. A line of best fit can be drawn through the dots to show the trend. Option A is wrong because a pie chart shows how one total is divided into parts, not how two variables relate. Option C is wrong because a bar chart compares values of one variable across categories. Option D is wrong because a triangular graph shows three components that add up to 100 per cent, such as the sand, silt and clay in a soil. Exam tip: relationship between two variables = scatter graph; parts of a whole = pie chart; three parts of 100 per cent = triangular graph.

Practice Questions

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Q2.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following statements is/are correct? 1. Himalayan rivers have their origin in the snow-covered areas, hence are dry in winter season. 2. Rivers of the Peninsular Plateau have reached maturity. 3. Himalayan rivers depict all the three stages of normal cycle of erosion. Select the correct answer using the code given below.

  1. A.2 only
  2. B.1 and 3 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: C. 2 and 3 only

Himalayan rivers are perennial, so statement 1 is wrong, while statements 2 and 3 are correct. Himalayan rivers such as the Ganga, Indus and Brahmaputra rise from glaciers and snowfields and also get monsoon rain, so they flow all year round, including in winter.

Q3.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following statements related to latitude are true? 1. Rainfall, temperature and vegetation vary with latitude. 2. The difference between the longest day and the shortest day increases with latitude. 3. Indira Point is located approximately at 6°45' N latitude. Select the correct answer using the code given below.

  1. A.1 and 2 only
  2. B.1 and 3 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: D. 1, 2 and 3

All three statements about latitude are true. Latitude decides how directly the Sun's rays strike a place, so temperature, rainfall and the type of vegetation change from the equator towards the poles, from hot, wet rainforests to cold tundra.

Q4.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following lakes is/are situated in Ladakh? 1. Tso Kar 2. Pangong Tso 3. Tsomgo 4. Tso Moriri Select the correct answer using the code given below.

  1. A.1 only
  2. B.2 and 3
  3. C.1, 2 and 4
  4. D.2 and 4 only
Show answer
Correct answer: C. 1, 2 and 4

Tso Kar, Pangong Tso and Tso Moriri are high-altitude lakes of Ladakh, while Tsomgo lies in Sikkim. Pangong Tso, at about 4,350 metres, is a long, narrow lake that stretches from Ladakh into Tibet, and most of its length lies on the Chinese side.