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| The bending, tilting and breaking of the Earth's crust; the change in the shape of rock in response to stress. |
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| A seismic wave that causes particles of rock to move in a back-and-forth direction. |
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| A seismic wave that causes particles of rock to move in a side-to-side direction. |
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| A principle that states that younger rocks lie above older rocks if the layers have not been disturbed. |
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| A principle that states that geologic processes that occurred in the past can be explained by current geologic processes. |
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| The sudden return of elastically deformed rock to be un-deformed shape. |
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| A principle that states that geologic change occurs suddenly. |
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| A large, semicircular depression that forms when the magma chamber below a volcano partially empties and causes the ground above to sink. |
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| A wide, flat land form that results from repeated non explosive eruptions of lava that spread over a large area |
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| A wave of energy that ravels through the Earth, away from an earthquake in all directions. |
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| The scientific study of fossils. |
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| A funnel shaped pit near the top of the central vent of a volcano. |
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| An opening at the surface of the Earth through which volcanic material passes. |
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| The body of molten rock that feeds a volcano. |
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| A vent or fissure in the Earth's surface through which magma and gases are expelled. |
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| To become fractured along a plane as a result of forces acting parallel to the plane. |
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| The sinking of region of the Earth's crust to lower elevations. |
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| The rising of regions of the Earth's crust to higher elevations. |
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| A break in a body of rock along which one block slides relative to another. |
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| The bending of rock layers due to stress. |
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| Stress that occurs when forces act to stretch an object. |
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| Stress that occurs when forces act to squeeze an object. |
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| The boundary between tectonic plates that are sliding past each other horizontally. |
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