| A | B |
|---|
| weathering | the breaking down of rocks |
| running water | the major cause of erosion |
| wind | the main cause of erosion in deserts |
| exfoliation | breking off of rocks in thin sheets or slabs |
| frost action | breaking of rocks though water freezing |
| landslide | the large movement of rocks and soil down a slope |
| root-pry | the enlarging of cracks by plant roots |
| oxidation | the chemical combining of oxygen with another substance |
| erosion | the movement of rock and soil from one place to another |
| deposition | the laying down of sediments in a new place |
| dunes | mounts of sand deposited by the wind |
| loess | layers of fine sand and silt deposited in the same area |
| windbreak | a barrier to slow down wind |
| runoff | the movement of water over the Earth's surface |
| drainage system | network of rills, gullies, streams and rivers in an area |
| drainage basin | the area drained by a river and its tributaries |
| delta | formed when large amounts of sediments are deposited at the mouth of a large river |
| flood plain | the flat area on both sides of a large river |
| glacier | large mass of moving snow and ice |
| deflation | movement of loose materials by the wind |
| abrasion | the wearing away of rock by blown particles of sand and soil |
| waves | those constantly erode and shape the shoreline |
| sea stack | columns of resistant rock on beaches |
