THE CORE

                                THE CORE 

It is separate from the mantle by the Gutenberg Weichert Discontinuity and extends up to the centre of the earth. 

It consists of three parts : 

             1) Outer Core 

             2) Middle Core 

             3) Inner Core 

1) Outer Core : 

                It extends from 2900 to 4982 kms. It is considered to be in a state of homogenous fluid and it does not transmit S - Waves.

2) Middle Core :

               It is a transition layer, extends from 4982 kms to 5121 kms. The material is in a fluid to semi - fluid state.

3) Inner Core : 

               It is believed to contain metallic nickel and Iron and is called “ nife ”. It is probably solid with a density of about 18. Its thickness is 1250 kms.