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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 Temperature is about 870° C
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MORISCO/WILLGING 2007 crust Lithosphere name 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 Moho Named after a Russian geologist Mohorovicic 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/cm 3 ) to the core (about 10.7 g/cm 3 ) - lighter materials floated to the top as the Earth was forming
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