| Term | Definition |
|---|
| Glaicer | lg moving masses of ice & snow that change lg area's of earth's surface through erosion & deposition |
| plucking | process that adds gravel, sand, and bolders to a glaicer's bottom as water freezes & thaws breaking off pieces of surrounding rock |
| till | mix of diferent sized sediment that is dropped from the base of a retreating glacier and can cover huge areas of land. |
| moraine | lg ridge of rocks & soil deposited by glaicers when it stops moving forward |
| deflation | erosion that occurs when wind blows over loose sediments, leaves courser ones behind. |
| abrasion | erosion that occurs when wind blown sediments strike rocks & sediments, polishing & pitting thier surface. |
| dune | mound formed when wind blown sediments pile up behind an obstacle; common land form in desert areas. |
| loess | windblown deposit of tightly packed, fine-grained sediments |
| weathering | break rocks into smaller and smaller pieces |
| mechanical weathering | physical process that breaks rocks apart without changing chemical make-up. |
| ice wedging | occurs when water freezes in the cracks of rocks and expands |
| chemical weathering | occurs when chemical reactions dissolve the minerals in rocks or changes them into different minerals. |
| erosion | process in which surface materials are worn away and transported from one |
| mass movement | any type of erosion that occurs as gravity moves materials down-slope |
| slump | mass movement that occurs when a mass of materials moves down a curved slope. |
| creep | mass movement in which sediments move down-slope very slowly |
| deposition | dropping of sediments that occurs when an agent of ersion |
| outwash | material deposited by melted water from a glacier |
| oxidation | chemical weathering process that occurs when metalic material is exposed to oxygen and water over time. |
| climate | weather pattern that occurs in a particuler area over many years. |
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