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Miscellaneous·Easy

Consider the following statements: 1. The crust and the uppermost part of the mantle are called asthenosphere. 2. The outer core is in liquid state, while the inner core is in solid state. Which of the statement given above is/are correct?

Consider the following statements:

1. The crust and the uppermost part of the mantle are called asthenosphere.

2. The outer core is in liquid state, while the inner core is in solid state.

Which of the statement given above is/are correct?

Options

  1. a.

    1 only

  2. b.

    2 only

    Correct answer
  3. c.

    Both 1 and 2

  4. d.

    Neither 1 nor 2

Explanation

  • Crust is the outermost solid part of the earth. It is brittle in nature. The thickness of the crust varies under the oceanic and continental areas. Oceanic crust is thinner, as compared to the continental crust.
  • The portion of the interior beyond the crust is called the mantle.
  • The upper portion of the mantle is called asthenosphere. The word ‘astheno’ means weak. It is considered to be extending upto 400 km.
  • The crust and the uppermost part of the mantle are called lithosphere.
  • The core-mantle boundary is located at the depth of 2,900 km. The outer core is in liquid state, while the inner core is in solid state. The core is made up of very heavy material, mostly constituted by nickel and iron. It is sometimes referred to as the Nife Layer.

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