| A | B |
|---|
| weathering | it is the breaking down of rock and other materials on the Earth's surface. |
| mechanical weathering | when larger rocks are broken into smaller pieces without changing the chemical make-up. |
| chemical weathering | when the chemical make-up of a rock is changed. |
| frost action | when water gets into the cracks of rocks, freezes, expands and the rock breaks. |
| root-pry | plants o roots growing in the cracks of rocks and eventually causes the rock to break. |
| gravity | it can pull loosened rocks down a hill, as they fall they collide and break into pieces. |
| landslide | tumbling of soil, rocks and boulders going down a hill from the cause of an earthquake, volcanic eruption or heavy rain. |
| abrasion | wind blown sand can cause weathering of rocks. |
| carbination | carbon dioxide can mix in with the rain and form carbonic acids which can dissolve certain materials. |
| sulfuric acid | in places where there is sulfur oxides in the air and acid rain can cause stuff to dissolve. |
| plant acids | some plants produce weak acids which can dissolve certain materials. |
| erosion | the process by which weathered rock and soil are moved fron one place to another. |
| deposition | the process by which sediments are laid down in new locations. |
| soil creep | the slowest kind of mass wasting and occurs when alternating periods of freezing and thawing. |
| wind | the most active agent of erosion in deserts, plowed fields and on beaches. |
| oasis | wind that erodes desert sands down to the depth where water is present. |
| dunes | in desert areas wind that blows sand in the same place to form a dune. |
| loess | many layers of fine sand and silt form loess deposits which are very fertile. |
| running water | running water is the main cause of erosion. |
| glaciers | a large mass of moving ice or snow. |
