水的循环
<p> <span word="water">water</span> <span word="can">can</span> <span word="change">change</span> <span word="from">from</span> <span word="one">one</span> <span word="form">form</span> <span word="to">to</span> <span word="anotheer">anotheer</span>. <span word="the">the</span> <span word="heat">heat</span> <span word="of">of</span> <span word="the">the</span> <span word="sun">sun</span> <span word="evaporates">evaporates</span> <span word="water">water</span> <span word="from">from</span> <span word="the">the</span> <span word="oceans">oceans</span>, <span word="seas">seas</span>, <span word="rivers">rivers</span> <span word="and">and</span> <span word="lakes">lakes</span>. <span word="the">the</span> <span word="heat">heat</span> <span word="also">also</span> <span word="evaporates">evaporates</span> <span word="water">water</span> <span word="from">from</span> <span word="the">the</span> <span word="ground">ground</span> <span word="and">and</span> <span word="from">from</span> <span word="plants">plants</span> <span word="and">and</span> <span word="animals">animals</span>. <span word="water">water</span> <span word="vapour">vapour</span> <span word="is">is</span> <span word="formed">formed</span>. <span word="this">this</span> <span word="forms">forms</span> <span word="clouds">clouds</span> <span word="in">in</span> <span word="the">the</span> <span word="air">air</span>.</p><p> <span word="when">when</span> <span word="the">the</span> <span word="clouds">clouds</span> <span word="come">come</span> <span word="near">near</span> <span word="a">a</span> <span word="mountain">mountain</span>, <span word="they">they</span> <span word="are">are</span> <span word="forced">forced</span> <span word="to">to</span> <span word="rise">rise</span>. <span word="as">as</span> <span word="the">the</span> <span word="clouds">clouds</span> <span word="rise">rise</span>, <span word="they">they</span> <span word="are">are</span> <span word="cooled">cooled</span>. <span word="the">the</span> <span word="higher">higher</span> <span word="they">they</span> <span word="rise">rise</span>, <span word="the">the</span> <span word="more">more</span> <span word="they">they</span> <span word="are">are</span> <span word="cooled">cooled</span>. <span word="this">this</span> <span word="causes">causes</span> <span word="more">more</span> <span word="and">and</span> <span word="more">more</span> <span word="water">water</span> <span word="vapour">vapour</span> <span word="to">to</span> <span word="condense">condense</span>. <span word="in">in</span> <span word="this">this</span> <span word="way">way</span>, <span word="the">the</span> <span word="tiny">tiny</span> <span word="drops">drops</span> <span word="of">of</span> <span word="water">water</span> <span word="in">in</span> <span word="the">the</span> <span word="clouds">clouds</span> <span word="get">get</span> <span word="bigger">bigger</span> <span word="and">and</span> <span word="bigger">bigger</span> <span word="until">until</span> <span word="they">they</span> <span word="are">are</span> <span word="heavy">heavy</span> <span word="enough">enough</span> <span word="to">to</span> <span word="fall">fall</span> <span word="to">to</span> <span word="the">the</span> <span word="earth">earth</span> <span word="as">as</span> <span word="rain">rain</span>.</p><p> <span word="some">some</span> <span word="rain">rain</span> <span word="water">water</span> <span word="which">which</span> <span word="falls">falls</span> <span word="on">on</span> <span word="the">the</span> <span word="earth">earth</span> <span word="is">is</span> <span word="again">again</span> <span word="evaporated">evaporated</span>. <span word="some">some</span> <span word="of">of</span> <span word="it">it</span> <span word="sinks">sinks</span> <span word="into">into</span> <span word="the">the</span> <span word="ground">ground</span>. <span word="it">it</span> <span word="may">may</span> <span word="be">be</span> <span word="used">used</span> <span word="up">up</span> <span word="by">by</span> <span word="thirsty">thirsty</span> <span word="plants">plants</span>. <span word="it">it</span> <span word="may">may</span> <span word="reach">reach</span> <span word="a">a</span> <span word="well">well</span> <span word="or">or</span> <span word="a">a</span> <span word="spring">spring</span>. <span word="most">most</span> <span word="of">of</span> <span word="the">the</span> <span word="water">water</span> <span word="goes">goes</span> <span word="back">back</span> <span word="to">to</span> <span word="the">the</span> <span word="rivers">rivers</span>, <span word="seas">seas</span> <span word="and">and</span> <span word="oceans">oceans</span>. <span word="this">this</span> <span word="process">process</span> <span word="then">then</span> <span word="starts">starts</span> <span word="all">all</span> <span word="over">over</span> <span word="again">again</span>. <span word="this">this</span> <span word="process">process</span> <span word="is">is</span> <span word="called">called</span> <span word="the">the</span> <span word="water">water</span> <span word="cycle">cycle</span>.</p><p> </p>
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