Water cycle or Hydrologic cycle - PowerPoint PPT Presentation

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Water cycle or Hydrologic cycle

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Water cycle is the Natural circulation of the earth's water, in which water evaporates into the atmosphere, where it condenses and falls as rain(liquid), or snow(solid) returning to the sea by rivers or returning to the atmosphere by evapotranspiration. It is also called hydrologic cycle. – PowerPoint PPT presentation

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Title: Water cycle or Hydrologic cycle


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Water cycle or Hydrologic cycle
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Water cycle
  • Water cycle is the Natural circulation of the eart
    h's water, in which water evaporates 
    into the atmosphere, where it condenses and falls 
    as rain(liquid)  or snow(solid),
    returning to the sea by rivers or returning to the
     atmosphere by evapotranspiration.  It is
    also called hydrologic cycle.
  • In other words, The continuous process by which wa
    ter is circulated throughout the Earth
    and its atmosphere. The Earth's water enters the a
    tmosphere through evaporation from bodies of water
    like lake, ocean, rivers and from ground surfaces
    , Plants, animals and even us also add water vapou
    r to the air by transpiration. As it rises into th
    e atmosphere, the water vapour condenses to form c
    louds. Rain and snow are the forms of precipitati
    on return it to the Earth, where it flows into bod
    ies of water and into the ground, beginning the cy
    cle again.  

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Water cycle
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Water cycle
  • How does water work in a water cycle?
  •  
  • In the water/hydrologic cycle, water evaporates
    from oceans, lakes, swamps,
  • rivers, plants, animals and even you, in the form
    of  water vapor. The Water 
  • vapor condenses into millions of tiny droplets
    that form clouds. Clouds lose their water as snow
    or rain, and this process is called
    precipitation.
  •  
  • The water cycle consists of three stages.
  • Stage 1 - Evaporation, as the sun's heat converts
    liquid water from rivers, lakes and oceans into
    water vapor.
  • Stage 2 - Condensation. As the water vapor rises
    into the atmosphere, it cools and condenses into
    droplets of liquid water. Wind currents carry
    this water as clouds.

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Water cycle
  • Stage 3 - Precipitation, in which water falls
    back to Earth as rain or snow.
  •  
  • Why does the water cycle is never ending process?
  •  
  • The driving force of the water cycle is the
    fluctuation in heat from the sun. The water cycle
    process keeps going because cycles of day and
    night, the seasons and the movement of water in
    any of its forms changes its environment,
    specifically its temperature. It is a complex
    process, involving many stages. Solar warming of
    a large lake causes a large amount of water vapor
    to be released. Cold, dry winds above capture the
    moisture and cool it rapidly, causing it to
    condense into tiny water droplets. These droplets
    then freeze, forming clouds of ice crystals. As
    these clouds are pushed toward shore, the ice
    crystals grow too large to keep suspended in the
    air and fall as snowflakes. Any hills along the
    shoreline force the air upward and increase the
    rate of snowfall. The snow falls on the shore,
    and when conditions are warm enough, begins to
    melt. The resulting liquid water either flows
    back into the lake or is absorbed as groundwater.
  • Relatively this cycle known as lake effect snow.
    And it is a never ending cycle.
  • For study in detail visit www.takshilalearning.com
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