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The interior structure of the Earth is layered in spherical shells, like an onion. These layers can be defined by their chemical and their rheological properties. Earth has an outer silicate solid crust, a highly viscous mantle, a liquid outer core that is much less viscous than the mantle, and a solid inner core

The interior structure of the Earth is layered in spherical shells, like an onion. These layers can be defined by their chemical and their rheological properties. Earth has an outer silicate solid crust, a highly viscous mantle, a liquid outer core that is much less viscous than the mantle, and a solid inner core

Earth has an outer silicate solid crust, a highly viscous mantle, a liquid outer core that is much less viscous than the mantle, and a solid inner core.

I think what you're looking for is the crust.

Lithosphere

Hi Chelsey,

Good question, many places only name the layers and give their temperatures, but don't often describe their physical nature.

The Earth can be divided into four basic layers. Three of these are solid, only one is liquid. 

From outermost layer (closest to the surface), moving towards the centre of the Earth, the layers are:

  • Crust: Solid
  • Mantle: Solid (Often mistaken as lava, but really it is Rock, just it flows under pressure, like road tar. This layer is sometimes further divided into Upper Mantle and Lower Mantle.)
  • Outer Core: A shell of liquid iron. (Sometimes also called the Mesolayer.)
  • Inner Core: Solid ball of mostly iron.

Good luck!

The lithosphere, consisting of the crust and uppermost mantle, is comprised of solid brittle rock. The mantle is also considered a solid, although because of intense heat and partial melting, it is ductile. Finally, the inner core is also considered a solid due to incredible pressure on the largely iron-nickel material there.


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