Structure of Earth

Structure of Earth

Structure of earth

Interior is divided into: 

1. Crust
2. Mantle
3. Core

 

1. Crust  

• Uppermost part
•  Solid
• Thickness extend from 5 to 40 km inside earth
• Consist of rock line Granite, basalt etc.
• Density 2.5 - 3 gm/cc. 

2. Mantle


• Below crust is mantle divide into outer and inner part.
• Outer part extends up to 660 km.
• Inner part extends up to 2900 km. 
• Density 3.38-5.56 gm/cc.
• Semi - Solid state.
• Temperature is around 3000 ⁰C 

mantle is further divided into three parts

       3. Core

• It have two parts Inner core and Outer core.
• Inner core is solid  and composition consist of Nickel and Iron.
• Outer Core is Liquid zone.
• Radius of Inner core - 1290 km.
• Outer core thickness -2300 km.
• Density around 13.5 gm/cc contrast to 25  ⁰C



outer core

• Temperature is estimated around 2500 ⁰C 

inner core