Landforms

[|Forces that change landforms]

**Weathering: The process of breaking down rock. Over time weathering changes rock to soil. Water, Ice, Wind, and Gravity all cause weathering. Moving water is a common cause of weathering. Examples:Water flowing down hill, rain falling from the atmosphere, and a stream moving quickly. If water freezes it will expand and take up space. **  Erosion:The carrying away of rock, soil, and sediment of other things by natural processes.

Two causes of erosion are wind and water.Water- can cause the formation of new landforms. Wind-it carries away tiny particals. __Key Vocab.__ valley-a long depression in the earths surface that useawaly canyon-deep dangerous valleys with steep sides. meanders-looping changes of direction in a river or stream. tributary-a river or stream that does not reach the ocean.