The concept of weathering:weathering is the process of destroying the original under the effect of the physical and chemical factors (air, water, ice, temperature change) and the activity of organisms in normal conditions on the surface of the EarthAs the siege, "weathering" became a term of science rather than the narrow sense also of pinyin. Based on the impact factor and method of different variations of the original stone that divides the weathering out 3 kinds: physical weathering, chemical weathering and biological weathering
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