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Bella Lu. Vocab. U7
| Question | Answer |
|---|---|
| asthenosphere | the upper layer of the earth's mantle |
| Continental Drift | the gradual movement of the continents across the earth's surface through geological time. |
| Lithosphere | the rigid outer part of the earth, consisting of the crust and upper mantle. |
| Pangaea | a supercontinent that existed during the late Paleozoic and early Mesozoic eras |
| Plate | plates act like a hard and rigid shell |
| Plate Tectonics | rigid lithospheric plates that move slowly over the underlying mantle. |
| Seafloor Spreading | formation of new areas of oceanic crust |
| Earthquake | a sudden and violent shaking of the ground |
| Epicenter | the point on the earth's surface vertically above the focus of an earthquake |
| Fault | an extended break in a body of rock |
| Focus | the point of origin of an earthquake |
| Magnitude | the great size or extent of something. |
| Normal Fault | where two blocks of rock are pulled apart, as by tension. |
| Reverse Fault | the hanging wall rises relative to the footwall |
| Seismic Wave | an elastic wave in the earth produced by an earthquake or other means. |
| Seismograph | an instrument that measures and records details of earthquakes, such as force and duration |
| Strike-Slip Fault | a fault in which rock strata are displaced mainly in a horizontal direction, parallel to the line of the fault |
| Tsunami | a long high sea wave caused by an earthquake |
| Batholith | a very large igneous intrusion extending deep in the earth's crust |
| Caldera | a large volcanic crater |
| Cinder Cone Volcano | During the eruption, blobs ("cinders") of lava, blown into the air, break into small fragments that fall around the opening to the volcano |
| Dike | an intrusion of igneous rock cutting across existing strata |
| Hot Spot | an area of volcanic activity, especially where this is isolated. |
| Shield Volcano | a broad, domed volcano with gently sloping sides, characteristic of the eruption of fluid, basaltic lava. |
| Sill | a tabular sheet of igneous rock intruded between and parallel with the existing strata. |
| Volcano | a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust. |
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Bella.lubinskas
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