Transcript Internal Structure of the Earth

Internal Structure of
the Earth
Internal Structure (cont.)
Crust – the outer, hardest layer of the
lithosphere; continental crust (mostly
granite, 2.7 g/cm³, 0-40 km) and
oceanic crust (basalt 3.0 g/cm³, 010km)
Lithosphere – crust and upper most,
solid, rigid portion of the mantle –
broken into pieces (0-100 km)
Internal Structure (cont.)
 Asthenosphere – partially molten rock in
the upper mantle; plastic consistency (100700km)
 Mohorovic Discontinuity (Moho) – the
boundary between the Earth’s crust and the
upper mantle -- averaging 8 kilometers
(5 miles) in depth under the oceans and 32
kilometers (20 miles) in depth under the
continents
Internal Structure (cont.)
 Mantle – molten rock that has a much
stiffer consistency than the asthenosphere –
solid yet behaves like a liquid similar to a
glacier (3.3 – 5.5 g/cm³, 700- 2900km)
 Outer Core – liquid iron and nickel (9.9 –
12.1 g/cm³, 2900 to 4980km)
 Inner Core – solid, iron and nickel (12.713.0 g/cm³, 4980 to 6370km)
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http://earth.unh.edu/esci402/docs/Earth%20Interior.jpg
Internal Structure (cont.)
what some scientists think is going on…
Internal Structure (cont.)
~ The End ~
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