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Inside Our Earth — Social Studies STD 7 — Question

CBSE BoardEnglish MediumSTD 7Social StudiesInside Our Earth5 Marks
Question
Explain the main features of the Crust.
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Answer

  1. It is the outermost solid layer of the earth.
  2. It is made up of the lightest materials.
  3. It is 35kms on the conditions masses and 5km on the oceanic masses.
  4. The continental crust is mainly made up of silica and alumina hence called SIAL.
  5. The oceanic crust is made of silica and magnesium hence called SIMA
  6. The crust comprises only 1 percent of the earth’s crust.

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