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Where Does the Water Cycle Begin?

Diagram of the water cycle.If I asked you where a bicycle wheel begins, you'd know that was a trick question. So, the mention of the word "cycle" in "water cycle" is a giveaway that the water cycle has no beginning or ending. But, if it did, where do YOU think it would begin. Make your choice from the list below and then see what others think.

Atmosphere Condensation
Evaporation Evapotranspiration
Freshwater storage Groundwater discharge  
Groundwater storage Ice and snow
Infiltration Oceans
Precipitation Snowmelt
Springs Streamflow
Surface runoff Sublimation

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URL: http://ga.water.usgs.gov/edu//watercyclebegin.html
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Page Last Modified: Thursday, 10-May-2012 07:59:02 EDT