| A | B |
|---|
| weathering | physical and chemical processes that change rock on or near the earth's surface |
| sediment | very fine particles of rock; mud, sand, or silt |
| mechanical weathering | processes that break rock into smaller pieces but do not change its composition |
| chemical weathering | when rock is changed into a new substance |
| erosion | when weathered material is moved by the wind, water, ice, or gravity |
| delta | sediment that builds up in a fan-like landform at the mouth of a river |
| loess | deposits of windblown silt and clay sediment that produce very fertile soil |
| glacier | large mass of ice that gravity slowly moves across land |
| glaciation | the changing of landforms by moving glaciers |
| moraine | ridges fromed by rocks left behind by melted glaciers |
| humus | organic material found in soil |
