The document discusses different landforms and the natural processes that create them. It provides examples of landforms like mountains and asks questions to test understanding of concepts like erosion, deposition, and mass movement. Natural forces like glaciers, rain, and volcanoes can cause sudden landform changes by eroding and transporting sediment. The Colorado River carved the Grand Canyon through erosion over millions of years. Dams regulate water flow while glaciers form where more snow falls than melts. Floodplains are rich farm areas but dangerous to live in due to periodic flooding from rivers. Mudflows and creep slowly move soil downhill through gravity. Volcanic eruptions can deposit new landforms underwater. River channels form landforms through erosion