The Earth's Interior Structure

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  • The earth is divided into THREE main parts: Core, Mantle and Crust.
  •  The core has TWO parts: the inner and outer core.
  •  The mantle consist of the lower mantle and the upper mantle (asthenosphere).
  • The crust  is also known as the lithosphere and it is divided into the continental crust and the oceanic crust.
  • There are TWO discontinuity : (a) Gutenburg discontinuity-seperates the core from the mantle.
     (b) Mohorovicic discontinuity- seperates the mantle from the crust.