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  1. Of the total volume of the earth, which layer forms the major part ?

    2. A.

     Sial
    B.

     Sima
    C.

     Mantle
    D.

     Core

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    Answer : Option D

    Explanation :

    Core forms the major part of the total volume of earth. The innermost layer, forming the metallic centre of the Earth. Core of the Earth is like a dense magnetic ball of minerals (Iron & Nickel). Hence, it is also called NIFE (NI – Nickel & Fe – Ferrous Magnesium i.e Iron). Temperature increases at the rate of 1 degree Celsius for every 32 meters of depth.

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