| A | B |
|---|
| abrasoin | the wearing away of a substance by solid particles carried by wind, water, or other forces |
| weathering | the breaking down of rocks adn other materials at the Earth's surface. |
| mechanical weathering | weathering that does not invole changes in the chemical makeup. |
| chemical weathering | weathing that involves changes in the chemical makeup. |
| root-pry | the breaking apart of rocks caused by the growth of plant roots. |
| landslide | a large downhill movement of loose rocks and soil caused my the pull of gravity. |
| oxidation | the process in which oxygen chemically combines with another substance. |
| carbination | the process in which carbonic acid reacts chemically with other substances. |
| loess | accumulations of fine particles of sand and silt deposited by the wind. |
| drainage system | the network of streams and other bodies of running water that ultimately drain into an area's main river. |
| tributation | a large stream or samll river that flows into an area's main river. |
| drainage basin | the area drained by a main river and it's channels. |
| glaciers | a large mass of moving ice and snow. |
| waves | erode and shape the shoreline. |
| sea stack | a column of resistant rock left behind after a sea cliff has been eroded away. |
| sea cave | a hollowed out portion of a sea cliff. |
| frost action | water gets into the cracks of the rock, water freezes, it expands which cause the rock to brake. |
| gravity | can pull loosened rocks down a mountain cliff in a landslide. As they fall, they collide with one another and break into smaller pieces. |
| sulfuric acid | in places where there is sulfur oxides in the air, acid rain can be produced. The sulfuric acid is very strong and can dissolve rocks, metals and other materials quickly. |
| plant acid | some plants produce weak acids which can dissolve contain minerals |
| soil creep | the slowest kind of mass wasting occurs when alternating periods of freesing and throwing, animal activity or water movement disturb the soil particles, as the particles begin to move, gravity pulls them away slowly downhill. |
| deflation | is erosion caused by wind remobing loose material such as clay, silt and sand from the earth. |
| dunes | in dessert areas and along shorelines, wind blown sand is often deposited near rocks and bushes.Wind blowing over these deposits is slowed down and more sand is deposited, The mounds of sand grow and form sand dunes. |
| wind | most active agent of erosion in desserts, in plowed fields and on beaches. |
| mass wasting | the downhill movement o sediments caused by gravity. |
