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| the inner most layer of Earth's interior is the solid _________ |
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| lies above the inner core and is thought to be composed mostly of molten metal |
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| is the largest layer of Earth's interior. |
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| the rigid, upper part of Earth's mantle and the crust |
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| 30 sections (lithosphere is broken into) that move around on the plastic like asthenosphere, which is part of the mantle. |
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| are large fractures in rocks along which movement occurs. |
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| when one plate sinks underneath another plate. |
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| are made of huge, tilted blocks of rock that are separated from surrounding rock by faults.2 |
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| are mountains formed by the folding of rock layers caused by compression forces |
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| form when forces inside Earth push up the crust |
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| over time, layer upon layer of the lava piles up until a cone-shaped feature called ____ forms. |
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| according to this, Earth's lithosphere floats on a plasticlike upper part of the mantle, the asthenosphere |
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| What do geologists use to indirectly observe Earth's interior? (2) |
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| Earthquakes and surface rocks |
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| When do Seismic Waves change speed and direction? (2) |
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| Depending on the density and material they travel through |
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| formed deep within Earth to surface. |
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| Inner core, outer core, mantle, crust |
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| Earth's structure's theory is based on (3) |
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| physical properties of density, temperature, and pressure that change with depth. |
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| Earth's moving plates are sections of lithosphere, ___ |
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| the rigid upper part of the mantle and crust. |
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| are edges where plates meet. |
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| Tension can pull plates ____, resulting in new lithosphere forming in the gaps. |
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| plates could cause mountains as rock crumbles and folds. |
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| occurs when a denser plate sinks underneath a less dense plate. |
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| causes faults and earthquakes as two plates slide past each other. |
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| convection in the mantle circulates material and moves plates. |
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| push at mid-ocean ridges causes plates to slide down the slope |
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| happens as plates move away from mid-ocean ridges and become denser. |
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| form from huge tilted blocks of rock separated from surrounding rock by large faults. |
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| form by compression forces folding rock layers |
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| forces push up Earth's crust and allow the sedimentary rock to erode, leaving igneous or metamorphic rock. |
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| over time, layers of lava can form a cone-shaped mountain |
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| underwater volcanic mountains |
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| hot spots formed by plumes of magma in the mantle |
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| principle indicates Earth's crust and lithosphere float on the upper mantle. |
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| Earth's crust is ____ under mountains |
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| When mountains erode, the crust rises because the __ has been removed. |
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