Water Erosion Answers

Near its source, a river is fast moving and flows on a steep mountain slope. It rapidly erodes a V-shaped, steep-sided valley. Its course may include waterfalls and rapids. Farther along its course, a river flows over gently sloping land. Here it flows more slowly, spreading out and eroding the land to form a wide, flat valley. As the river begins to wind from side to side, meanders form.