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Interior of the Earth — Geography STD 8 — Question

Maharashtra BoardEnglish MediumSTD 8GeographyInterior of the Earth3 Marks
Question
The upper layer of the crust is called Sial.
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Answer

  1. The rocks in the upper layer of the crust have predominance of the compounds of silicon and aluminium.
  2. The word Sial is derived from the word Silica (Si) and Aluminium (Al). Therefore, the upper layer of the crust is called (Si + Al) Sial.

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