Transcript layers of the earth

The
Earth’s
Layers
crust
Moho
mantle
outer core
inner core
Composition of the Earth’s Layers
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Crust: A very thin, solid outer layer. The
oceanic crust is about 5 km thick. The
continental crust is 30–40 km thick.
Moho: The boundary between the crust
and the mantle (named for the Mohorovic
discontinuity).
Mantle: The layer beneath the crust. The
mantle is about 2885 km thick, and
consists of two layers.
Crust
Upper mantle
Lower mantle
Outer core
Inner core
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Upper mantle: Includes a solid layer
fused to the crust, it is about 70 km thick.
This layer combined with the crust is called
the lithosphere.
Beneath this is the asthenosphere, which
is a flowing (plastic-like) partly molten
layer. The asthenosphere is thought to be
the layer upon which tectonic plates ride.
The asthenosphere exists between about
100 and 250 km deep.
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Lower mantle: Is composed of solid rock
under conditions of extremely high
temperature and pressure. This layer is
about 2,185 km thick.
Crust
Upper mantle
Lower mantle
Outer Core
Inner Core
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Outer Core: A layer about 2,270 km
(1,400 miles) thick, having the properties
of a metallic liquid.
Inner Core: A solid, metallic, spherical
layer about 1,216 km (755 miles) thick.
http://www.cnn.com/interactive/nature/99
03/earth.layers/frameset.exclude.html
(animation of the layers)
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