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.
Both chemical and mechanical weathering breakdown a rock into particles, just in diffrent ways. Mechanical weathering is the physical weathering in which a rock is broken down â¦ into particles. Chemical weathering is the weathering in which rocks are disolved, decomposed, or loosend to change the minerals in the rock.29 people found this useful.hemical weathering is the dissolution, carbonation, oxidation, or hydrolysis of rock and mineral by chemical means only, mostly from reactions with water or the acids contained in rainwater. Other materials are formed in the process.