Monday, 17 October 2011

Formation Of Clouds And Rain

  • The Sun heats up the surface of the Earth.
  • Water from land, seas, lakes and rivers evaporates to form water vapour in the air.
  • Water vapour rises, meets the cool air above and condenses.
  • Water droplets are formed.
  • These water droplets come together to form clouds.
  • When more water vapour condenses, the water droplets join to form bigger and heavier clouds.
  • These water droplets will fall onto Earth as rain.
  • Rain will return to land, rivers, lakes and seas. 
  • This process repeats and is known as the water cycle.
  • The process ensures that the total volume of water on Earth is constant.

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