GEOLOGY

Detailed explanation-1: -The sideways movement occurs because the maximum velocity of the stream shifts toward the outside of the bend, causing erosion of the outer bank. At the same time the reduced current at the inside of the meander results in the deposition of coarse sediment, especially sand.

Detailed explanation-2: -Erosion is greatest beyond the middle of the bend in the meander. This causes the meander to migrate downstream over time.

Detailed explanation-3: -Water is responsible for the majority of weathering, erosion, and transportation of sediments on Earth. Erosion from liquid water occurs from moving water on Earth’s surface-such as streams, rain, ocean, lakes, floods, etc. As water moves across Earth’s surface, it takes soil and sediments along with it.

Detailed explanation-4: -A meander is formed because the river flows faster on the outside edge of any small curve and slower along the inside edge. Deposition of sediment occurs on the inner edge because the river, moving slowly, cannot carry its sediment load, creating a slip-off slope.