Identify and describe the process that changes rock to dust. Why does dust cause chemical weathering
The process that changes rock to dust is called mechanical weathering, specifically through the process called abrasion. Abrasion occurs when rocks collide and rub against each other due to external forces like wind, water, or ice movement.
Abrasion involves the physical wearing down of rocks, resulting in the formation of smaller and smaller fragments, ultimately turning them into dust. This process is commonly observed in areas with high wind or water flow, such as deserts, riverbeds, or coastlines.
Dust causes chemical weathering because it increases the surface area of the rock that is exposed to the surrounding environment. As the rock is reduced to dust, a larger surface area is available for interaction with the chemicals and compounds present in the air or water. This increased surface area allows for more effective chemical reactions between the rocks and the surrounding substances.
Chemical weathering occurs when the composition of the rock is altered due to chemical reactions. These reactions can involve substances like oxygen, water, or acidic compounds. The increased surface area provided by the dust allows these substances to penetrate deeper into the rock, causing a more efficient breakdown and alteration of the minerals in the rock.
Therefore, dust accelerates the process of chemical weathering by providing a larger contact area for chemical reactions to occur, leading to the further degradation and disintegration of the rock.