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Volcanoes & Earthquakes

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Across
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Fault that occurs when rocks move horizontally past each other
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Where magma deep within the mantle metls through the crust
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Pocket under volcano where magma collects
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Area covered by lava as it pours from vent
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Slowest moving and most destructive waves
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Fault that occurs when rocks move around
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Constructive force that adds new rock to existing land
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One major volcanic belt where volcanos surrond the pacific ocean
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When magma reaches the surface
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Faults that push together until a section of rocks moves upward
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Measures magnitude of earthquakes waves and assigns it a sign
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Most abundant minerals on crust and mantle
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Opening where magma and gas leaves the volcano
Down
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Vibrations moving out from focus
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Machine that detects size, times and molecules of an earthquakes
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Molten mixture of rock
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Occur when rocks shift suddenly along plate boundaries
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Scale based on destruction made by many measures and observable destruction
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Beginning part of an earthquake
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Breaks in the earths surface along which rocks can move
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Occur beneath the surface
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Less dense and causes magma to flow into cracks
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Weak spot in earths crust where magma comes to the surface
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Bowl shaped area that forms around the vent
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Long tube that moves from chamber to surface