| A | B |
|---|
| carbonation | Carbonic acid reacts chemically with other substances. |
| oxidation | Oxygen chemically combines with another substance. eg. rusting; Rocks that have iron undergo this process and break down. |
| sulfuric acid | a much stronger acid than carbonic acid. It wears away rocks. |
| plant acid | Weak acids made by plants that break down rocks. |
| lichen | Small green or brown things grown on rocks. They make a mild acid that breaks down rocks (chemical weathering). |
| mass wasting | Gravity pulls rocks and soil down slopes. |
| wind erosion | wind that can carry sand and silt to a new location. Rock hitting rock blown by the wind. |
| sand dunes | hills of sand deposited by the wind |
| loess | accumulation of sand and silt deposited from the wind |
| runoff | the way rain water flows over the land |
| stream load | the amount of sand or silt that a stream can carry |
| drainage system | connected waterway like rivers and streams-how they drain the land |
