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Which of the following statements are correct?
The crust is about 35 km. on the continental masses and only 5 km. on the ocean floors.
  • The main mineral constituents of the continental mass are silica and alumina.
  • The crust forms only 5% of the volume of the Earth.
    Select the correct answer using the code given below:
    • a)
      1 and 2 only
    • b)
      2 and 3 only
    • c)
      1 and 3 only
    • d)
      1, 2 and 3
    Correct answer is option 'A'. Can you explain this answer?
    Most Upvoted Answer
    Which of the following statements are correct? The crust is about 3...
    • The uppermost layer over the Earth’s surface is called the ‘crust’. It is the thinnest of all the layers. It is about 35 km. on the continental masses and only 5 km. on the ocean floors.
    • The main mineral constituents of the continental mass are silica and alumina. It is, thus, called ‘sial’ (si-silica and al- alumina). The oceanic crust mainly consists of silica and magnesium. It is, therefore, called ‘sima’ (si-silica and ma- magnesium).
    • Just beneath the crust is the mantle which extends up to a depth of 2,900 km. below the crust.
    • The innermost layer is the core with a radius of about 3,500 km. It is mainly made up of nickel and iron, and is called ‘nife’ (ni – nickel and fe – ferrous, i.e., iron). The central core has very high temperature and pressure.
    • Note: The crust forms only 1% of the volume of the Earth, 84% consists of the mantle and 15% makes the core. The radius of the Earth is 6,371 km.
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    Which of the following statements are correct? The crust is about 35 km. on the continental masses and only 5 km. on the ocean floors. The main mineral constituents of the continental mass are silica and alumina. The crust forms only 5% of the volume of the Earth. Select the correct answer using the code given below:a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer?
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    Which of the following statements are correct? The crust is about 35 km. on the continental masses and only 5 km. on the ocean floors. The main mineral constituents of the continental mass are silica and alumina. The crust forms only 5% of the volume of the Earth. Select the correct answer using the code given below:a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Which of the following statements are correct? The crust is about 35 km. on the continental masses and only 5 km. on the ocean floors. The main mineral constituents of the continental mass are silica and alumina. The crust forms only 5% of the volume of the Earth. Select the correct answer using the code given below:a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements are correct? The crust is about 35 km. on the continental masses and only 5 km. on the ocean floors. The main mineral constituents of the continental mass are silica and alumina. The crust forms only 5% of the volume of the Earth. Select the correct answer using the code given below:a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer?.
    Solutions for Which of the following statements are correct? The crust is about 35 km. on the continental masses and only 5 km. on the ocean floors. The main mineral constituents of the continental mass are silica and alumina. The crust forms only 5% of the volume of the Earth. Select the correct answer using the code given below:a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for UPSC. Download more important topics, notes, lectures and mock test series for UPSC Exam by signing up for free.
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