Science-Geology 8 Vocabulary pt 2
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13 terms
Terms | Definitions |
|---|---|
 rift valley | a valley with steep sides |
| convergent boundary | a plate boundary where two plates move toward each other |
| subduction zone | The region where oceanic plates sink down into the asthenosphere. |
| trench | a long steep-sided depression in the ocean floor |
| volcano | a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt |
| transform boundary | a plate boundary where two plates move past each other in opposite directions |
| fault | a crack in the earth's crust resulting from the displacement of one side with respect to the other |
| convection current | current in Earth's mantle that transfers heat in earth's interior and is the driving force for plate tectonics |
| earthquake | shaking and vibration at the surface of the earth resulting from underground movement along a fault plane of from volcanic activity |
| topographic map | a map that shows the surface features of an area |
| fault-block mountains | A mountain formed by blocks of rock uplifted from normal faults. |
| weathering | The breaking down of rocks and other materials on the Earth's surface. |
| erosion | the mechanical process of wearing or grinding something down (as by particles washing over it) |
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