Multiple choice

Who among the following classified the earth`s interior into Sial, Sima and Nife on the basis of composition?

  1. M. Mohorovicic

  2. Edward Suess

  3. G. Guttenburg

  4. S. Connard
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B Correct answer
Explanation

Edward Suess classified Earth's interior into three compositional layers: Sial (silica + aluminum, the upper continental crust), Sima (silica + magnesium, the oceanic crust and lower continental crust), and Nife (nickel + iron, the core). Mohorovicic discovered the Moho discontinuity, Gutenberg discovered the core-mantle boundary, and Connard identified the Conrad discontinuity within the crust.

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