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The inside of the earth :
when we study the indide of the earth we find three layers: the crust, the mantle and the nucleus.
The Crust: Is the external layer of the earth. Its thickness varies from 6 to 12 kilometres on the sea beds to around sixteen km in th continental aries where the great mountain ranges are lokedet
The Mantle:is the layer wich goes from the earth´s crust down to a depth of two, 2900 km
The core: Is the inner-mostlayer. It goes from a depth of 2900 km to de earth´s core which is locker about 6378 km from the surface.The earth´s crust and the mantle form the litosphere.

homework: the materials of the earth´s surface.
t materials of the beach,in the litosphere ,atmosphere and the