| A | B |
|---|
| Deflation | Is when wind removes materials such as clay,silt,and sand from the land |
| Abrasion | the wearing away of a substance by solid particles carrried by wind water or other forces |
| Oasis | Is when wind erodes a sand dune until water is available on the surface so trees, shrubs,and grass can grow |
| Dunes | is deposited sand over a long period of time that has piled up |
| Chemical weathereing | weathering that involves changes in the chemical makeup of rocks |
| Running water | erodes certain kinds of minerals by wearing them away |
| Root-pry | the breaking apart of rocks carried by the growth of plant roots. |
| Gravity | erodes rocks by pulling them down when they get pulled down they hit each other and break into smaller pieces |
| Organic activity | the breaking of rocks caused by the growth of the roots |
| Water | water dissolves most of the minerals holding rocks together |
| Temperature | at day a rock expands because of heat then at night the rock shrinks pretty soon that rock will crack |
| frost action | when water seeps into a crack and frezzes it expands then it shrinks again pretty soon the rock cracks |
| Sulfuric acid | when sulfuric acid gets in the rain and falls it wearsaway certain minerals |
| Plant acids | certain plants create weak acids when these plants grow on or near them they let off the acid and slightly dissolves the rock |
| erosion | the process by which the productsof weathering are moved from one place to another |
| Rapid mass wasting | is the wasting away of a substance in large quantities |
| runoff | is when rain falls and flows over the surface of earth |
| Drainage system | is the large network of rills, gullies,streams and rivers in one area |
| Drainage basin | the area drained by a main river and its channel |
| Flood plain | is the land on both sides of a mature river or stream |
| Delta | a triangular formation of sediment deposited at the mouth of a large river that flows into a lake or ocean |
| Rills | a tiny stream |
| gullies | a small canyon worn away by water |
| stream | a small quantitie of water that helps carry small sediments of rock down the stream |
| River | a strong current of water that carries sediment down it |
| glacier | a large mass of moving ice and snow |
