inner core solid diameter = 1480 km 3200 - 3960 miles below surface temp = 9032 – 10,832 ºf...
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Inner Core
Solid
Diameter = 1480 km
3200 - 3960 miles below surface
Temp = 9032 – 10,832 ºF (5000-6000 ºC)
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Outer Core
Plastic/ liquid
1990 Km thick1,800 - 3,200 miles below surface
Temp = 7200 - 9032 ºF (4000 - 5000ºC)
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Mantle
2865 km thick (80% of earth’s volume)
Temp = 5400 ºF (3000ºC)
3 distinct layers
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Mesosphere
Non-Newtonian substance
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AsthenosphereGreek meaning ‘without strength’
124 miles (200 km) thick
45–155 miles (72–250 km) below surface
Plastic/ Liquid
Temp = 2640 oF (1400 oC)
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Andrija Mohorovičić
First to use seismic waves to determine earth’s layers in 1909
Mohorovičić Discontinuity
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Lower Lithosphere
Brittle
Broken
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Upper Lithosphere or Crust
Solid
Broken into Plates
High in Silica
Rigid with some flexibility
Two types of crust
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Oceanic Crust
4-7 miles (6-11 km) thick
Basalt
Age is relatively young
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Continental Crust
Ave. thickness of 20 to 25 miles
(30 to 40 km)
Granite
Much older than oceanic