| A | B |
|---|
| chemical reaction | the change of one or more substances into other substances |
| weathering | the process by which rocks on or near Earth's surface break down and change |
| mechanical weathering | the process by which rocks and minerals break down into smaller pieces |
| frost weathering | the repeated thawing and freezing of water in the cracks of rocks |
| exfoliation | the process by which outer rock layers are stripped away |
| chemical weathering | the process by which rocks and minerals undergo changes in composition as the result of chemical reactions |
| oxidation | the chemical reaction of oxygen with other substances |
| process | a natural phenomenon marked by gradual changes that lead toward a particular result |
| erosion | the removal and transport of weathered material from one location to another |
| deposition | the process in which materials are dropped in another location |
| rill erosion | the erosion by running water in small channels on the side of a slope |
| gully erosion | the erosion by running water of deep and wide channels |
| sediment | solid material that has been deposited on Earth's surface by wind, water, ice, gravity, or chemical precipitation |
| soil | the loose covering of broken rock particles and humus overlying the bedrock of Earth's surface |
| residual soil | soil located above its parent material |
| transported soil | soil that has been moved to a location away from its parent bedrock |
| soil profile | the vertical sequence of soil layers |
| soil horizon | a distinct layer, or zone, within a soil profile |
