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G Chapter 3 Vocabula
pages 64 - 81
Term | Definition |
---|---|
Erosion | A process that wears away surface materials and moves them from one place to another. |
Deposition | Agents of erosion drop the sediments they are carrying as they lose energy. |
Mass movement | A type of erosion that happens as gravity moves materials downslope. |
Slump | A mass of material slips down along a curved surface. |
Creep | Sediments slowly shift their positions downhill. |
Glacier | A large mass of ice and snow moving on land under its own weight. |
Plucking | A process that adds gravel, sand, and boulders to a glacier's bottom and sides as water freezes and thaw, breaking off pieces of surrounding rock. |
Till | A mixture of different-sized sediments that is dropped from the base of a retreating glacier and can cover huge areas of land. |
Moraine | A big ridge of material piles p that looks as though it has been pushed along by a bulldozer. |
Outwash | Material deposited by the meltwater from a glacier, most often beyond the end of the glacier. |
Eskers | A type of outwash deposit that looks like a long, winding ridge. |
Continental Glacier | Cover ten percent of Earth's surface, mostly near the poles. |
Valley Glacier | Occur even in today's warmer global climate. Form above the snow line on mountains. |
Deflation | Wind blows across loose sediment, removing small particles such as silt and sand. |
Abrasion | Windblown sediment strikes rock, the surface of the rock gets scraped and worn away. |
Loess | Windblown deposit of tightly packed, fine-grained sediments. |
Dune | Mound formed when windblown sediments pile up behind an obstacle; common landform in desert areas. |