Most of the water that falls on the land as rain and snow, sooner or later goes back to a sea or an ocean. This happens in the following manner- When the snow on the mountains melt due to sun’s heat, the water flows down from the mountain in the form of rivers and streams. These river (that also receive rain water directly) travel long distances and ultimately end up joining a sea or an ocean. So, ultimately the water that evaporates from sea or an ocean is added back to them.