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Biosphere — Geography STD 11 Arts — Question

Gujarat BoardEnglish MediumSTD 11 ArtsGeographyBiosphere3 Marks
Question
Write a short note about the mulch.
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Answer

  • This upper layer of the earth is also called the crust.
  • Whose notebook matters are as follows:
  • This earth's crust is also called Bhukvach, which is made up of clay and rock layers.
  • The average thickness of this cover is $33\ km.$
  • While in mountainous areas its average thickness is $35$ to $50\ km.$ Is equal to.
  • In this mantle lies a thin layer of rocky rocks near the surface of the earth.
  • This cover is also called "fox".
  • In which "SI" means silica and "AL" means aluminum.
  • Taking the first two English letters of both minerals, this cover is known as "SIAL".
  • The layer below the "seal" is called the SIMA "boundary".
  • In which "SI" means serosilica and "MA" means magnesium, resulting in a layer of "boundary" beneath the seal.
  • The cube consists of basalt rocks on the surface and granite rocks in the lower layers.
  • At the time of a volcanic eruption, hot magma comes to the surface from this boundary layer.
  • The continents are mostly made up of "seals".
  • The "silicon" mineral is common in the structure of the "seal" and the "boundary" of the two sections of this coating.

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