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.
Let's review. Chemical weathering is the process by which rocks are broken down by chemical reactions. There are different types of chemical weathering. Hydrolysis is the chemical breakdown of a substance when combined with water.The most common example of hydrolysis is feldspar in granite rocks changing to clay.hemical weathering is what happens when rocks are broken down and chemically altered. Learn about the different types of chemical weathering, including hydrolysis, oxidation, carbonation, acid rain and acids produced by lichens.