9分雅思图表小作文范文全集之流程图 水循环

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9分雅思范文之流程图 水循环 The diagram below shows the water cycle, which is the

continuous movement of water on, above and below the surface of the Earth.

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范文集结：全部15篇9分雅思流程图范文汇总放送

范文

The picture illustrates the way in which water passes from ocean to air to

land during the natural process known as the water cycle.

Three main stages are shown on the diagram. Ocean water evaporates, falls as

rain, and eventually runs back into the oceans again.

Beginning at the evaporation stage, we can see that 80% of water vapour in

the air comes from the oceans. Heat from the sun causes water to evaporate, and

water vapour condenses to form clouds. At the second stage, labelled

‘precipitation’ on the diagram, water falls as rain or snow.

At the third stage in the cycle, rainwater may take various paths. Some of it

may fall into lakes or return to the oceans via ‘surface runoff’. Otherwise,

rainwater may filter through the ground, reaching the impervious layer of the

earth. Salt water intrusion is shown to take place just before groundwater

passes into the oceans to complete the cycle.(156 words, band 9)