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Layers of the Earth ... By analyzing the seismograms from many earthquakes, scientists have discovered that three main levels or shells exist within the Earth: ... Earthquakes: Inside The Earth...
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www.thetech.org/exhibits_events/online/quakes/inside/
www.thetech.org/exhibits_events/online/quakes/inside/
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The earth has three main levels. ... ; 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. ... Earthquakes: Inside The Earth...
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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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The mantle, which contains more iron, magnesium, and calcium than the crust, is hotter and denser because temperature and pressure inside the Earth increase with depth. As a comparison, the mantle might be thought of as the white of a boiled egg.
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pubs.usgs.gov/gip/dynamic/inside.html
pubs.usgs.gov/gip/dynamic/inside.html
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Looking Inside Earth; Although the interior of Earth is only a few tens of miles beneath our feet, it is more difficult to reach than the surface of Pluto or even a nearby star! The deepest mines in the world are only three to four kilometers deep.
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www.cotf.edu/ete/modules/volcanoes/vinside.html
www.cotf.edu/ete/modules/volcanoes/vinside.html
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Putting 200,000 psi inside a tire will blow it to (very tiny) smithereens! Putting 200,000 psi on the outside of a rock heated to near 1000 deg.F will cause it to flow like the hot, but unmelted, wax. So the heat and pressure inside Earth cause rock at depth to be soft, "without strength," forming the asthenosphere.
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www.cotf.edu/ete/modules/volcanoes/vinside1.html
www.cotf.edu/ete/modules/volcanoes/vinside1.html
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Exploring the Earth's Core ... The Earth, the Sun, and the rest of the solar system, was formed 4.54 billion years ago by accretion from a rotating disk of dust and gas. The immense amount of heat energy released from gravitational energy and from the decay of radioactive elements melted the entire planet, and it is...
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www.seismo.unr.edu/ftp/pub/louie/class/100/interior.htm...
www.seismo.unr.edu/ftp/pub/louie/class/100/interior.html
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Press here to see inside the earth ... Geophysics, which studies the physics of the Earth, has led to many significant discoveries about the Earth and its make-up. Seismologic studies of the Earth have uncovered new information about the interior of the Earth that has helped to give credence to plate tectonic theory.
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scign.jpl.nasa.gov/learn/plate1.htm
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Core, mantle, crust, right? Sorry, not so simple. ... You know Earth's schematic: core, mantle, crust, right? Sorry, not so simple. ... The honey would be convecting on its own inside the water and that's a much more complicated system."
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www.livescience.com/environment/080502-earth-inside.htm...
www.livescience.com/environment/080502-earth-inside.html
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