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| iron nickel core (molten outer core; solid inner core) |
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| strong layer of earths crust |
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| hot and weak layer of earths crust, mostly solid |
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| relationship between crustal thickness and elevation |
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| numerous submerged mountains, existing on the ocean floor |
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| the smooth surface of the ocean floor which is moderately deep (3-5 km) |
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| continents that continue outward from the shoreline under shallow seawater for hundreds of kilometers, form submerged benches or... |
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| broad, symmetrical ridges that cross the ocean basins. they are 2-3 kilometers higher than the average depth of the seafloor. |
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| sharp steps in the seafloor that are at right angles to the mid-ocean ridges. |
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| broad, high regions that reach high elevations such as on the Tibetan Plateau of Southern Asia. |
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| make up the deepest parts of the ocean |
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| crossing the seafloor are curving chains of islands known as this... |
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| within the oceans are several, broad elevated regions |
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| 3 types of relative plate motions |
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| divergent boundary, convergent boundary, transform boundary |
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| move horizontally past eachother |
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| oceanic plates move apart at mid-ocean ridges |
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| one plate moves down in ocean-ocean convergent boundary |
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| oceanic plates subducted on both sides |
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| mountain belts with volcanoes |
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| subduction beneath continental plates in pacific ring of fire |
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