The picture illustrates the way water passes from the ocean to air and lands during the process known as “water cycle”
Overall, there are three main stages in natural process. By starting with water, it’s clearly shown that 80 percent of water vapour in air comes from oceans.
Heat from the sun causes water to evaporate into air, and condensed water vapour forms cloud formation. At the second stage, water from formated clouds falls as rain or snow which is labelled as “precipitation” on the diagram.
Last stage in the cycle, rainwater can take various paths. Some of it returns to oceans via “surface runoff” from the mountains. Otherwise, water from lakes may filter through ground reaching the impervious layer of the earth, where it mix with seawater in an area called “salt water intrusion”.
