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Geography Chapter 12

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
Continental Shield   show
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show A migrating piece of Earth's crust, dragged about by processes of mantle convection and plate tectonics  
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Folding   show
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show An arch-shaped, upwards fold in which rock strata slope down from the central ridge of the fold  
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show A trough-shaped downward fold in which the rock strata slope towards the central axis of the fold (think 'sink')  
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Isostacy   show
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Faulting   show
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show A type of geologic fault in rocks. Tension produces strain that breaks a rock, with one side moving vertically relative to the other side along an inclined fault plane  
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show Compressional forces produce strain that breaks a rock so that one side moves upward relative to the other side  
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Thrust Fault   show
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Slip-Strike Fault   show
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Horst   show
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show Downward-faulted blocks produced by pairs of groups of faults [two blocks push a middle one down]  
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show The process of mountain building that occurs when large-scale compression leads to deformation and uplift of crust  
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show A sharp release of energy that sends waves travelling through Earth's crust at the movement of rupture along a fault or in association with volcanic activity  
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show The most powerful earthquakes on Earth; occurs along a subduction zone  
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show An explanation for how energy is released during an earthquake. Two sides of a fault rupture suddenly due to accumulating stress, snapping to new positions relative to each other  
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Seismometer   show
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show The location below the Earth's surface where the motion of seismic waves that cause an earthquake begins  
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Epicentre   show
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Foreshock   show
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Aftershock   show
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Richter Scale   show
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show The process whereby ground shaking, usually from an earthquake, disrupts and loosens the structure of the soil, causing it to flow  
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Moment Magnitude Scale   show
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Tsunami   show
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Volcano   show
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Viscosity   show
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show An explosively ejected rock fragment launched by a volcanic eruption  
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Pahoehoe   show
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show A volcanic landform of pyroclastics and volcanic rock, usually small and cone shaped  
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Caldera   show
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Effusive Eruption   show
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Shield Volcano   show
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show A type of effusive eruption that occurs when magma flows out from elongated fissures onto the surface and cools into extensive sheets of basaltic lava  
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Explosive Eruptions   show
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Composite Volcano   show
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Created by: TheresaH
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