Which statement describes chemical weathering?

Prepare for the Earth Science and Environmental Pollution Test. Study with engaging quizzes and detailed explanations on complex topics. Master your exam preparation here!

Chemical weathering is the chemical alteration of minerals in place, typically driven by reactions with water and atmospheric gases. Through processes like hydrolysis, minerals such as feldspar react with hydrogen ions from water to form clay minerals (like kaolinite) and soluble ions, while oxidation involves the reaction of iron-bearing minerals with oxygen to produce iron oxides and hydroxides (like hematite or goethite). These reactions change the mineral composition and create new substances, which is what defines chemical weathering. The other statements describe physical processes: breaking rocks apart without chemical change, melting rock to magma (an igneous process), or wind-blown abrasion (a mechanical form of weathering). So the description of hydrolysis and oxidation producing clays and oxides best captures chemical weathering.