Etiology. Cerebral palsy is relatively common, affecting 1 in 200 children. This number takes into account the full spectrum of the disorder, including milder cases, a broad definition of age of insult, and more complete case ascertainment.
Chemical weathering is the weakening and subsequent disintegration of rock by chemical reactions. These reactions include oxidation, hydrolysis, and carbonation.These processes either form or destroy minerals, thus altering the nature of the rockâs mineral composition.emperature and, especially, moisture are critical for chemical weathering; chemical weathering of rock minerals generally occurs more quickly in hot, humid climatic regions. Oxidation is the reaction of rock minerals with oxygen, thus changing the mineral composition of the rock.
Best Answer: CHEMICAL WEATHERING. -Weathering in which the chemical composition of the material is altered. - The process of breaking down rocks or minerals at or near the Earthâs surface by chemical processes, including hydrolysis, hydration, ion exchange, and oxidation. - During this process, the mineral composition of the rock is changed due to the influence of water, oxygen, and carbon dioxide.