morisco/willging 2007 layers of the earth characteristics of each of the earth’s layers
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MORISCO/WILLGING 2007
Layers of the Earth
Characteristics of each of the Earth’s layers
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MORISCO/WILLGING 2007
solid inner core
Made of iron and nickel
Temperature of 4300° C
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MORISCO/WILLGING 2007
liquid outer core
inner core
Made of iron and nickel
Temperature of 3700° C
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MORISCO/WILLGING 2007
mantle
Solid mantle
Made of rock-like material,
Temperature about 1500° C
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MORISCO/WILLGING 2007
asthenosphere
The asthenosphere is also called the “plastic-like” mantle because it flows like partially melted plastic.
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MORISCO/WILLGING 2007
rigid mantle
rigid mantleTemperature is
about 870° C
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MORISCO/WILLGING 2007
crust
Lithospherename for both the crust and rigid mantle
rigid mantle
Deepest mine is only about 3 miles into the crust!
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MORISCO/WILLGING 2007
Mohorovicic Discontinuity
Called the MohoNamed after a Russian geologistMohorovicic discovered that Earthquake waves sped up as they moved from the crust into the rigid mantle
Seismic waves slow down in softer/more liquid materials, such as the asthenosphere or outer core
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MORISCO/WILLGING 2007
Density and Pressure
Pressure increases as you move from the crust to the core due to the additional material pushing down
Density also increases from the crust (about 3 g/cm3) to the core (about 10.7 g/cm3) - lighter materials floated to the top as the Earth was forming