Sediment refers to small particles of rock, minerals, and organic material that settle at the bottom of bodies of water, such as rivers, lakes, and oceans. These particles can be transported by wind, water, or ice and accumulate over time. Sediment plays a crucial role in shaping landscapes and can provide valuable information about the Earth's history through the study of sedimentary rocks. Sediment can be classified into different types based on size, including clay, silt, sand, and gravel. Each type has unique characteristics and can affect water quality and habitat for aquatic life. Understanding sediment is important for fields like geology, environmental science, and civil engineering.