Weathering project By:Ryan and Adam Chemical weathering The erosion or disintegration of rocks, building materials, etc., caused by chemical reactions. Mechanical weathering Mechanical weathering is the process of breaking big rocks in to smaller fragments. This process usually happens near the surface of plants. Agents/sings of erosion The gradual destruction or diminution of something. The process of eroding or being eroded by wind, water, or other natural agents. Erosion prevention Erosion control is the practice or controlling wind or water erosion in agriculture, land development, coastal areas, river banks and construction. Deposition Deposition is the geological process in which sediments, soil and rocks are added to a landform or land mass.