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الموضوع: Water Cycle

  1. #1
    انجليزي مشارك الصورة الرمزية highness
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    Water Cycle

    Maybe you recycle cans, glass, and paper. Did you know that nature recycles, too? One of the things nature recycles is water. Water goes from the ocean, lakes, and rivers into the air. Water falls from the air as rain or snow. Rain or snow eventually find their way back to the ocean. Nature’s recycling program for water is called the water cycle.

    IN STORAGE

    The water cycle has four stages: storage, evaporation, precipitation, and runoff. Most of the water on Earth is in the first stage, storage. Water on Earth gets stored in oceans, lakes, rivers, ice, and even underground. The oceans store the majority of this water.

    EVAPORATION: INTO THE AIR

    Water goes from storage into the atmosphere (the air that surrounds Earth) by a process called evaporation. When water evaporates, it changes from a liquid into an invisible gas. The gas is called water vapor. Water vapor goes up into the atmosphere.

    Most of the water that gets into the air evaporates from the surface of the oceans. Water also evaporates from rivers and lakes. Water can also go from ice caps and icebergs into the air. Ice changing into water vapor is called sublimation.

    PRECIPITATION: BACK TO EARTH

    Water returns to Earth as precipitation—rain, snow, or other moisture. Precipitation requires ice or liquid water. Water vapor can change into tiny ice crystals or drops of water when the air gets cold enough. Clouds are collections of tiny ice crystals or water droplets.

    When the ice crystals or drops of water in a cloud get heavy enough, they fall to Earth as precipitation. Rain, snow, sleet, and hail are all forms of precipitation. Most precipitation falls into the oceans and goes right back into storage.

    RUNOFF: MOVING AROUND ON LAND

    Water that falls on land always flows from high places to lower ones. This flow is called runoff. Precipitation that falls on land runs downhill. The water cuts channels as it flows.

    Some water seeps into the ground. It fills cracks between rocks. Underground water also flows from places that are full to places that have less water.

    Water from land flows into streams. Streams flow down mountains. Streams join together to make rivers and eventually the water flows into storage in the ocean. Then the water cycle starts all over again.


    [FRAME="6 70"]Microsoft ® Encarta ® 2007. © 1993-2006 Microsoft Corporation. All rights reserved.[/FRAME]
    نظرا لظروفي القادمة سوف تقل مشاركتي وردودي فمن أعجبه أحد مواضيعي المتواضعة فليدعو لي بأن أحقق حلمي


  2. #2
    مميز الصورة الرمزية fona_85
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    رد : Water Cycle

    Thanks alot highness for the helpful information

    this is the nature of life

    l think even we as human beings we go into a cycle physically and mentally

    accept my passing
    [GLOW="CC6699"]معـاً لغــدٍ واعــد[/GLOW]

  3. #3
    شخصية بارزة الصورة الرمزية Aseel
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    رد : Water Cycle

    Thanks , brother, for the useful topic


    I used to teach that water cycle to my students


    as a part of their curriculum


    They were seven - year- old students

    they used to write a pragraph about water cycle with an illustration


    to go with :)

  4. #4
    انجليزي خبير الصورة الرمزية CHARLES DICKENS
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    رد : Water Cycle

    Wallahi I used not to enjoy scientific topics but this one got something special
    I read it all smoothly
    (-:
    thanks Highness for this topic
    by the way I like your Signature
    your Sis
    Mona
    Where flowers bloom .. So does Hope

  5. #5
    انجليزي مشارك الصورة الرمزية highness
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    in dusty city
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    رد : Water Cycle

    this is the nature of life
    that's right my mate.In my opinion, it is the law of nature

    I appreciate ur passing


    Thanks , brother, for the useful topic
    thanks my brother


    thanks Highness for this topic
    For the sake of simplicity,I chose this topic
    thanks my sis
    نظرا لظروفي القادمة سوف تقل مشاركتي وردودي فمن أعجبه أحد مواضيعي المتواضعة فليدعو لي بأن أحقق حلمي


  6. #6
    انجليزي خبير الصورة الرمزية alraad3
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    رد : Water Cycle

    although it is very dull to read such topics. i did my best to read it. frankly, it is presented in a very intreresting way and without any boredom.

    thank you very much and accept my passing

  7. #7
    انجليزي مشارك الصورة الرمزية highness
    تاريخ التسجيل
    Dec 2007
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    in dusty city
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    رد : Water Cycle

    although it is very dull to read such topics. i did my best to read it. frankly, it is presented in a very intreresting way and without any boredom.

    thank you very much and accept my passing

    I appreciate ur passing my brother . I wish I hope you are interesting
    نظرا لظروفي القادمة سوف تقل مشاركتي وردودي فمن أعجبه أحد مواضيعي المتواضعة فليدعو لي بأن أحقق حلمي


  8. #8
    شخصية بارزة الصورة الرمزية مــلك الحرف
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    رد : Water Cycle

    highness

    Thank u my brother

    great topic

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