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Dear Student,

(8)The Earth is divided into three concentric layers - 

1. Crust : It is the outermost layer of the earth's surface. 
2. Mantle : It is the layer below the Crust. The mantle consists of two layers:
   1. Upper Mantle
   2. Lower Mantle
3. Core : The innermost layer of the Earth. Core is divided into two layers:
   1. Outer Core
   2. Inner Core

(9) Orissa.
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