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GeographyEasyAsked in: SSC CHSL · 26 Oct 2020, Shift 3

Which of the following is NOT a metamorphic rock?

  1. A.Marble
  2. B.Sandstone
  3. C.Quartzite
  4. D.Slate

Correct answer

B. Sandstone

Explanation

The correct answer is B, Sandstone. Sandstone is a sedimentary rock: grains of sand carried by rivers or wind settle in layers and harden over time. Metamorphic rocks are different, being older rocks changed in place by great heat and pressure inside the crust, which is why they are harder and often banded. Option A is wrong because marble is limestone that has been metamorphosed. Option C is wrong because quartzite is the metamorphic form of sandstone itself. Option D is wrong because slate is metamorphosed shale and splits into thin sheets. Rocks fall into three families: igneous, formed from cooling magma or lava, sedimentary, formed from deposits, and metamorphic, formed by change. They pass from one family to another through the rock cycle, so sandstone can turn into quartzite, and any rock that melts and cools again becomes igneous. Exam tip: limestone becomes marble, sandstone becomes quartzite, shale becomes slate and coal becomes graphite.

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.