InteriorOfTheEarth

=__**The Interior of The Earth**__=




 * __THE LAYERS OF THE EARTH__**

The interior of the Earth is like an onion. It has lots of layers but there are four main layers of the Earth. The deeper you go into the middle of the Earth the hotter it becomes. The four main layers are the Crust, Mantle, Outer Core and Inner Core.

__**THE CRUST**__ The first layer is the layer we are living on which is called the Crust.The Crust is the coolest layer of the Earth which allows us to live on it. The crust is a thin brittle, rocky layer which in some areas is any where form 5-70 km thick depending on where you are. The Crust is the Earth's layer that we live on.The Oceanic and Continental Crusts are both different. The Continental Crust is the thickest part of the crust and averages 30-50km thick. It is dense and rocky, less dense and made of Sodium, Potassium, Aluminium and Silicate rocks which are like Granite. The Oceanic Crust is the thinest part of the Crust which is 5km to 10km thick which is mostly made up of Basalt, Diabase and Gabbro. The Continental Crust is more dense than the Oceanic Crust.



The second layer from the crust is the mantle. the Mantle is split into two, the Upper Mantle and The lower Mantle.Both the Lower and Upper Mantle together is the thickest part of the Earth's layers. It is about 2900 km thick and is extremely hot, averaging at about 500-2000 degrees. The mantle is soo hot that it is liquid. The mantle has the consistency of lava which is thick and hot, always moving/flowing slowly. The viscosity of the Mantle depends on the the amount of pressure it is under. (Viscosity: The state of being thick, sticky and semi-fluid in consistency due to the internal friction or pressure) The Mantle is made of rock that is more dense that the overlaying rock in the Crust. The Upper Mantle and the Crust together makes the lithosphere which the tectonic plates move over.
 * __THE MANTLE__**

__**THE OUTER CORE**__ The outer Core is the layer beneath the Mantle and is under much more pressure and gravity than the Mantle because it is deeper into the Earth. The outer core is liquid and made of Iron and Nickel.

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