Structure of the Earth - Wikipedia, the free encyclopedia
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The interior structure of the Earth , similar to the other terrestrial planets, is layered. These layers can be defined by either their chemical or their rheological properties. The Earth has an out...
en.wikipedia.org/wiki/Structure_of_the_Earth
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About 1,800 miles beneath the surface, Earth's internal structure changes abruptly where the solid rock of the mantle meets the swirling molten iron of the outer core. But the boundary between the core and the mantle may not be as sharply defined as scientists once thought.
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www.ucsc.edu/currents/01-02/12-03/earth.html
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The Liquid Outer Core ... The third layer of the earth is underneath the mantle, known as the liquid outer core. At about 1,300 miles thick, it is almost entirely made of iron, nickel, and oxygen. The heat is so intense that the metals are molten, and the layer flows very slowly, generating energy that produces the...
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www.icehouse.net/jmurphy/outercor.htm
www.icehouse.net/jmurphy/outercor.htm
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Traveling still deeper within the Earth, we next would encounter the Earth’s outer core, which extends to a depth of around 3000 miles beneath the surface. It is believed that this outer core is made up of super-heated liquid molten lava.
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www.kidsgeo.com/geology-for-kids/0023-earths-outer-core...
www.kidsgeo.com/geology-for-kids/0023-earths-outer-core.php
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; Beneath the mantle is the Earth's core. The Earth's core consists of a fluid outer core and a solid inner core. Because the outer core contains iron, when it flows it generates a magnetic field. This is the source of the Earth's magnetic field.
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www.thetech.org/exhibits_events/online/quakes/inside/co...
www.thetech.org/exhibits_events/online/quakes/inside/core.html
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Circulating magma in the molten outer core generates a weak magnetic field, which the researchers suspect may be leaking into the inner core and generating an electric current. The twisting force generated by this electromagnetic interaction may be what drives the inner core's rotation.
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www.livescience.com/environment/050825_earthcore.html
www.livescience.com/environment/050825_earthcore.html
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It is made up of four main layers: 1) the inner core: a solid metal core made up of nickel and iron (1200 km diameter) ; 2) the outer core: a liquid molten core of nickel and iron ; 3) the mantle: dense and mostly solid silicate rock ;
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www.windows.ucar.edu/tour/link=/earth/Interior_Structur...
www.windows.ucar.edu/tour/link=/earth/Interior_Structure/interior.html
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The discovery of the magnetic field by the Mariner 10 spacecraft puzzled scientists, who believed that because of its small size the planet's core had long ago solidified. ... But it matched what would be expected for an object whose outer core is molten and not forced to rotate along with its shell.
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www.usatoday.com/tech/science/space/2007-05-03-mercury-...
www.usatoday.com/tech/science/space/2007-05-03-mercury-core_N.htm
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