| A | B |
|---|
| weathering | breaking down of rocks and other materials on the Earth's surface |
| mechanical weathering | weathering that does not make changes in the chemical makeup of rocks |
| frost action | when water gets into the rock's cracks and freezes causing rocks to break |
| root weding or root pry | when rocks are broken apart by the growth of roots |
| landslide | large downhill movement of loose rocks and soil pulled by gravity |
| abrasion | wearing away of a substance by solid particles carried by wind, water or other forces |
| chemical weathering | weathering that involves changes in the chemical makeup of a rock |
| oxidation | process where oxygen combines chemically with another substance |
| leaching | process in which water washes minerals from the topsoil down to the subsoil |
| soil conservation | using methods to protect the soil |
| erosion | movement of rock or sediment from one location to another |
| four agents of erosion | wind, water, gravity,glacier |
| ice wedging | when water goes into cracks, expands, and breaks rocks |
