Weathering is the decomposition of rocks, soils and their minerals through direct contact with the planet's atmosphere. Weathering occurs in situ, or "with no movement", and thus shouldn't to be confused with erosion, which involves the movement and disintegration of rocks and minerals by agents such as water, ice, wind, and gravity. Two important classifications of weathering processes exist. Mechanical or physical weathering involves the breakdown of rocks and soils through direct contact with… (More on Weathering)