The lightest layer of the Earth is:

The lightest layer of the Earth is:

  • (A) Nife
  • (B) Sima
  • (C) Sial
  • (D) Mantle
The Sial consists of silica and aluminum and is the highest layer of the Earth’s crust. It is the lightest layer due to the presence of lower-density minerals, which are dominated by granitic rocks, on top of the heavier layers. The density of the Sial usually ranges from 2.7 to 2.9 g/cm³.
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Related MCQs:

 ‘NATO’ is an abbreviation of:

  • (A) North Atlantic Treaty Organization
  • (B) Non-Aligned Treaty Organization
  • (C) Non-Aligned Trading Organization
  • (D) North American Transport Organization

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