| A | B |
|---|
| weathering | the process by which rock materials are broken down by the action of physical and chemical processes |
| mechanical weathering | the breakdown of rock into smaller pieces by physical means (without changing) |
| abrasion | the grinding and wearing away of rock surfaces through the mechanical action of other rock or sand particles |
| chemical weathering | the process by which rocks break down as a result of chemical reactions (changing) |
| acid precipitation | rain, sleet, or snow, that contains a high concentration of acids |
| types of mechanical weathering | abrasion, frost wedging, plants(roots), and animals(burrows) |
| frost wedging | when water gets into a crack in rocks and freezes(expanding) causes rocks to crack |
| root pry | tree and other plant roots wedge their way into rocks causing them to crack |
| types of chemical weathering | acid rain, and oxcidation |
| acid rain | causes rocks to dissolve |
| oxcidation | causes rocks to turn rusty brown color when combined with oxygen |
