| A | B |
|---|
| carbonation | 碳酸与别的物质发生化学反应 Carbonic acid reacts chemically with other substances. |
| oxidation | 氧化 Oxygen chemically combines with another substance. eg. rusting; Rocks that have iron undergo this process and break down. |
| sulfuric acid | 硫酸 a much stronger acid than carbonic acid. It wears away rocks. |
| plant acid | 植物酸 weak acids made by plants that break down rocks. |
| lichen | 青苔 Small green or brown things grown on rocks. They make a mild acid that breaks down rocks (chemical weathering). |
| drainage system | 河流网，onnected waterway like rivers and streams-how they drain the land |
| wind erosion | 凤侵蚀 wind that can carry sand and silt to a new location. Rock hitting rock blown by the wind. |
| sand dunes | 沙丘 hills of sand deposited by the wind |
| loess | 风刮来的沙土 accumulation of sand and silt deposited from the wind |
| runoff | 雨水流走的形式， 径流 way rain water flows over the land |
| stream load | 河水携带的泥沙量 how much sand or silt that a stream can carry |
| mass wasting | 滑坡Gravity pulls rocks and soil down slopes. |
