Raging Rivers Water Cycle (Hydrologic- Hydro=Water {Greek in origin})

Pollution Water pollution is when waste, chemicals, or The circulation of the earth's water, in other particles cause a body of water (i.e. which water evaporates from the sea rivers, oceans, lakes) to become harmful to the into the atmosphere, where it fish and animals that need the water to survive. condenses and falls as rain or snow, returning to the sea by rivers or returning to the atmosphere by

evapotranspiration. : 161km Longest UK Rivers: Longest World Rivers long River Severn: 354km (Wales/) River Nile: 6650km (Africa) Source: Arbury Hill in . : 348km (England) River Amazon : 6400km (South America) Flows through River Trent: 297km (England) Northamptonshire, Yangtze River : 6300km (China) into Peterborough River Great Ouse: 230km (England) then to The Wash, in Mississippi River: 6275km Norfolk. River Wye: 215km (Wales/England) (USA/Canada)

Yenisei: 5539km (Russia) Source The source of a river or stream is the place Deposition Material carried downstream Stream A stream is a small, narrow river. where it begins. by a river is deposited on the river bed (left behind). Tributary A tributary is a stream feeding a larger stream Erosion Erosion is the gradual destruction or a lake and removal of rock or soil in a particular area a river (or the sea or weather) Estuary An estuary is where a river meets the sea. Meander One of a series of regular Mouth The place where it flows into the sea. There, saltwater mixes with freshwater. The curves, bends, loops, turns, or river becomes wider and wider and flows windings in the channel of a slowly to the ocean. river.

Spring A spring is a point where water flows out of Oxbow lake A small, curved lake lying on Valley A valley is a low stretch of land the ground. Often the start of a river. the flood plain of a river; the between hills, especially one that has remnant of a former a river flowing through it. meander.