Many Scientists came up with their own theories till the time when Newton proposed that Earth's interior is made up of much denser material. The Density of the inner Earth is twice as that of the rocks on the surface of the Earth. This density reveals the cause for the formation of different layers inside the Earth.
The interior of the Earth is like a layered onion, with three main shells namely, Crust, Mantle and Core. Each layer is further divided in to two parts. The two parts of crust are namely, Oceanic crust and continental crust. Similarly the two parts of mantle are named as Upper Mantle and Lower Mantle. Finally the two parts of the Core are named as Upper Core and Lower Core.
read more.....
http://www.wonderwhizkids.com/index.php/earth-s-interior
The interior of the Earth is like a layered onion, with three main shells namely, Crust, Mantle and Core. Each layer is further divided in to two parts. The two parts of crust are namely, Oceanic crust and continental crust. Similarly the two parts of mantle are named as Upper Mantle and Lower Mantle. Finally the two parts of the Core are named as Upper Core and Lower Core.
read more.....
http://www.wonderwhizkids.com/index.php/earth-s-interior
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