This course talks about Hydro cycle. 
Hydro cycle, also called water cycle/hydrologic cycle is the continuous circulation of water in the Earth-atmosphere system. Out of many processes involved in the water cycle, the most important processes are ; evaporation, transpiration, condensation, precipitation, and runoff. Although the total amount of water within the cycle remains essentially constant, its distribution among the various processes is continually changing.

Hydro Cycle

4. Hydro Cycle - Part D

1. Hydro Cycle - Part A