Explain the role following in the weathering process. (a) rainfall (b) temperature fluctuation

The region in which earthen debris resides also influences patterns and degrees of weathering. Rocks and soil in dry, warm tropical climates experiencing heavy rainfall and higher temperatures wear differently than the same materials in cold and dry climates. A higher temperature and longer exposure to humidity, such as is experienced in tropical conditions, makes rocks fade much more quickly than rocks of the same variety in colder regions. Abundant rain leads to the rapid wearing of rock surfaces; this type of wear classifies as chemical weathering. In regions prone to chemical weathering, which are areas in tropical regions and areas with mild year-round temperatures, chemical weathering presides. This type of weathering produces gradual yet noticeable changes in the surrounding landscape, too. These areas have undulating terrains with sloping hills and thicker, richer soils than northern climates. Physical weathering dominates in colder climates; these landscapes have sharper, more rugged features and thin soils.