| A | B |
|---|
| weathering | the breaking down of the earth's surface into smaller and smaller pieces (chemical as well as physical) |
| mechanical weathering | frost wedging -water gets into cracks freezes and expands to breat the crack larger |
| frost wedging | water seaps into cracks of earth -freezes -and pushes the two pieces apart or to fall away |
| chemical weathering | the disolving of rock by water that is somewhat acidic and break it down or change its structure |
| acid rain | caused mostly by carbon dioxide disolving with water or sulfur dioxide particles from factories -it disolves rock faster |
| erosion | is the movement of weathered materials from one location to another -gravel, sand, soil |
| water erosion | water picks up material and moves it to another location -dramatic because sediment acts like sandpaper/sandblaster |
| sediment | small particles of soil sand and gravel carried along by water |
| areas created by deposit of sediment | floodplains, deltas |
| wind erosion | the removal of soil from large areas of exposed soil (fields) and it is deposited in a different location (ditches) |
| Loess | the silt of wind erosion, extreemely fine soil particles |
| glaciers | giant rivers of ice which gradually/physically cut away at the surface of the earth -carries dird, rocks and boulders large distances |
| moraine | the area where a glacier has receded and deposited all of the contents it eroded as it was moving |
