River

The hydrological water cycle

the continuous movement of water on, above, and below the Earth's surface, driven by the sun's energy

 DRAINAGE BASIN 

the watershed (the surrounding high ground that forms the boundary), the source (the river's origin), tributaries (smaller streams flowing into the main river), confluences (points where rivers join), and the mouth (where the river empties into a lake, sea, or ocean).

Erosion 

hydraulic action, abrasion, attrition, and solution.

Deposition 

the process where a river drops the material, or "load," it has been carrying when it loses energy and can no longer hold it.