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T1 GEOGRAPHY CH1 Interior of the Earth — Social Science STD 7 — Question

Tamilnadu BoardEnglish MediumSTD 7Social ScienceT1 GEOGRAPHY CH1 Interior of the Earth2 Marks
Question
What is the crust?
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Answer

  • The crust is the outermost layer of the earth.
  • It is about 35 km on the continental masses and 5 km on the oceanic floors.
The crust comprises two parts:
  1. The upper part called SIAL and
  2. The lower part called SIMA. SIAL is lighter than SIMA.

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