Final answer:
Weathering is the process that changes rock to dust. Dust causes chemical weathering by providing a greater surface area for chemical reactions to occur.
Step-by-step explanation:
The process that changes rock to dust is known as weathering. Weathering can occur through mechanical or chemical processes. Mechanical weathering involves physical forces that break down rocks into smaller particles, such as freezing and thawing or abrasion from wind or water. Chemical weathering involves chemical reactions that alter the composition of rocks, such as when minerals in rocks react with water or oxygen.
Dust can cause chemical weathering because it contains small particles that provide a greater surface area for chemical reactions to occur. When dust comes into contact with rocks, it can react with minerals in the rocks, leading to their decomposition and the formation of new substances. For example, when dust containing acidic compounds comes into contact with limestone rocks, it can cause the rocks to dissolve and form caves or other landforms.