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.
Types of Mechanical Weathering Granite exfoliation Types of Chemical Weathering Results mainly from the action of rainwater, oxygen, carbon dioxide, and acids of plant decay. Agents of Chemical Weathering Agents of Chemical Weathering The chemical reaction of water with other substances is called hydrolysis. Common materials undergoing hydrolysis: Feldspar Hornblende Augite Agents of Chemical Weathering The chemical reaction of oxygen with other substances is called oxidation.