Which term describes erosion caused by rock fragments transported by water?

Which term describes erosion caused by rock fragments transported by water?

• A. Alluvium
• B. Abrasion
• C. Air Pressure
• D. Source

Answer: (B)

The main idea here is how rocks wear away through the action of other rocks being moved by water. This process is abrasion. In rivers and streams, solid particles carried in the flow grind and scratch against the bed and banks, progressively wearing them down. That mechanical wearing by transported rock fragments is what erosion by abrasion refers to. Alluvium is the material that gets deposited by running water, not the process of eroding rock. Air pressure isn’t a factor in this type of erosion, and a source is just where sediments originate, not how erosion happens. So the term that best describes erosion caused by rock fragments transported by water is abrasion.

The main idea here is how rocks wear away through the action of other rocks being moved by water. This process is abrasion. In rivers and streams, solid particles carried in the flow grind and scratch against the bed and banks, progressively wearing them down. That mechanical wearing by transported rock fragments is what erosion by abrasion refers to.

Alluvium is the material that gets deposited by running water, not the process of eroding rock. Air pressure isn’t a factor in this type of erosion, and a source is just where sediments originate, not how erosion happens. So the term that best describes erosion caused by rock fragments transported by water is abrasion.