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Anatomy of the interior of Earth –
Making a pie slice of the Earth.
Anatomy of the earth – Pie Slice
Inner core: first 1220 km layer of interior of the earth.
Iron-Nickel and solid
Solid because of the pressure
Outer core: next 2260 km layer
Iron – Nickel and liquid
the flow and movement of Iron causes earth’s magnetic field
Lower mantle: next 2230 km layer
rigid layer, but still capable of movement (especially next to the
liquid outer core.
Upper mantle: next 660 km layer
solid and rocky layer
Crust: 5-70 km thin outer layer Average thickness – 35 km
Oceanic – denser than continental crust; about 5 km thick
Continental – less dense than oceanic crust; about 70 km thick
Lithosphere – Crust and part of upper mantle
extends about 100 km into the interior of Earth.
Cool rigid shell
Asthenosphere – Part of the upper mantle
extends about 200 km into the interior of Earth.
soft weak layer that lies under the lithosphere
Moho – Morohorovic discontinuity,
The boundary that separates the crust from the mantle.
Tectonic plates – The lithosphere is divided into sections called plates that
move over the softer asthenosphere.