| A | B |
|---|
| abrasion | a type of erosion that occurs when windblown sediments strike |
| creep | a type of mass movement in which sediments move down-slope very slowly; common in areas of freezing and thawing, and can cause walls, trees, and fences to lean downhill |
| deflation | a type of erosion that occurs when wind blows over loose sediments, removes small particles, and leaves coarser sediments behind |
| deposition | dropping of sediments that occurs when an agent of erosion, such as gravity, a glacier, wind, or water, loses its energy and can no longer cary its load |
| dune | mound formed when windblown sediments pile up behind an obstacle; common landform in desert areas |
| erosion | process in which surface materials are worn away and transported from one place to another by agents such as gravity, water, wind, and glaciers |
| glacier | large, moving masses of ice and snow that change large areas of Earth's surface through erosion and deposition |
| loess | windblown deposit of tightly packed, fine-grained sediments |
| mass movement | any type of erosion that occurs as gravity moves materials down-slope |
| moraine | large ridge of rocks and soil deposited by a glacier when it stops moving forward |
| outwash | material deposited by meltwater from a glacier |
| plucking | process that adds gravel, sand, and boulders to a glacier's bottom and sides as water freezes and thaws, breaking off pieces of surrounding rock |
| slump | a type of mass movement that occurs when a mass of mateial moves down a curved slope |
| till | mixture of different-sized sediments that is dropped from the base of a retreating glacier and can cover huge areas of land |
