What is sediment?

What is sediment?

• A. The deposition of soil in water.
• B. The eroded material that settles in water or air.
• C. A type of rock formed by erosion
• D. The process of soil formation

Answer: (B)

Sediment is the solid material that has been weathered or eroded from rocks or organic matter and is carried by water, wind, or ice until it settles out in a new location. The statement that best describes sediment is that eroded material that settles in water or air, because it focuses on the material itself and the way it moves and comes to rest. Sediment includes particles like sand, silt, clay, gravel, and organic debris, which can be transported in suspension or as a bedload and eventually deposited when the carrying energy decreases. This deposition is what can lead to the formation of sedimentary rocks over long timescales through processes like compaction and cementation. The other choices describe related processes or outcomes but not the material itself: deposition refers to laying down material, not what sediment is; a rock formed by erosion isn’t accurate for describing sediment, and soil formation is a different process altogether (pedogenesis).

Sediment is the solid material that has been weathered or eroded from rocks or organic matter and is carried by water, wind, or ice until it settles out in a new location. The statement that best describes sediment is that eroded material that settles in water or air, because it focuses on the material itself and the way it moves and comes to rest. Sediment includes particles like sand, silt, clay, gravel, and organic debris, which can be transported in suspension or as a bedload and eventually deposited when the carrying energy decreases. This deposition is what can lead to the formation of sedimentary rocks over long timescales through processes like compaction and cementation. The other choices describe related processes or outcomes but not the material itself: deposition refers to laying down material, not what sediment is; a rock formed by erosion isn’t accurate for describing sediment, and soil formation is a different process altogether (pedogenesis).