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14 Cards in this Set
- Front
- Back
asthenospere
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The plastic, partly solid. partly liquid layer of Earth's mantle just below the lithosphere that allows plate movements.
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continental crust
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The part of the Earth's crust (upper lithosphere)that makes up the continents and larger islands; thicker and lower in density than the oceanic crust, and granitic rather than basaltic in composition.
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convergent plate boundary
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the boundary between two colliding plates; often associated with mountain building, ocean trenches, and volcanic island arcs.
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crust
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The outermost solid layer of the Earth's solid lithosphere; separated from the uppermost mantle and lower lithosphere by the thin Moho interface.
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earthquake
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A vibration(shaking or movement) of Earth's lithosphere caused by the release of energy that has been stored
in Earth's rocks; most caused by rapid movement along faults, but also associated with other events, such as volcanic eruptions. many happen near the boundaries between tectonic plates |
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hot spot
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Major regions of volcanic activity in the interior parts of plates away from plate boundaries; may be the cause of chains of volcanic activity within moving plates, such as the Hawaiian Islands.
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inner core
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The innermost zone of Earth's core, which is thought to be composed of iron and nickle in a solid state.
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inner core
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The solid, innermost layer of Earth which is thought to be composed of iron and nickel.
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island arc
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A chain of volcanoes and volcanic islands that stretch hundreds of miles; formed from magma that rises as a result of an oceanic plate converging at subduction zones.
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lithospere
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The whole crust and the uppermost portion of the mantle (layer of rock that forms the solid outer shell at the top of the earth's interior)
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Mantle
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The mostly solid part of Earth between the crust and outer core.
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mid-ocean ridge
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a range of mountains on the ocean floor, composed mostly of volcanoes and lava flows; forms at zones of diverging plates.
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Moho
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The boundary between the earth's outermost layer and the mantle. Short for Mohorovicic Discontinuity.
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oceanic crust
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The portion of the Earth's crust that is usually below the oceans and not associated with the continental areas: thinner and higher in density than continental crust and basaltic rather than granitic in composition.
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