| A | B |
|---|
| erosion | process by which water, ice, wind or gravity moves weathered rock and soil |
| turbulence | movement of water in which the water moves every which way |
| deposition | process in which sediment is laid down in new locations |
| mass movement | any one of several processes by which gravity moves sediment downhill |
| runoff | water that flows over the ground surface rather than soaking into the wet ground |
| rill | a tiny groove in soil made by flowing water |
| gully | a large channel in soil formed by erosion |
| river | a large stream |
| tributary | a stream that flows into a larger stream |
| drainage basin | land area from which a river and its tributaries collect their water |
| divide | ridge of land that separates one drainage basin from another |
| flood plain | wide valley through which a river flows |
| meander | a looplike bend in the course of a river |
| oxbow lake | a meander cut off from a river |
| alluvial fan | wide, sloping deposit of sediment formed where a stream leaves a mountain |
| delta | landform made of sediment that is deposited where a river flows into an ocean |
| groundwater | water that fills the cracks and spaces in underground soil and rock layers |
| stalactite | calcite deposit that hangs from the roof of a cave |
| stalagmite | cone-shaped calcite that builds from the bottom of a cave |
| sediment | earth materials deposited by erosion |
| energy | ability to do work or cause change |
| potential energy | stored energy that is available to be used later |
| kinetic energy | energy an object has due to its motion |
| load | amount of sediment that a river or stream carries |
| friction | force that opposes the motion of one surface as it moves across another |
| karst topography | rainy regions where there is limestone near the surface; characterized by caverns and sinkholes |
