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What is dew?
All air contains
moisture, which is called water vapour. The moisture in
the air close to the ground comes from the soil and the plants.
When air cools during the night, the moisture is cooled and water droplets form on the grass and plants. This is dew.
We see the dew early in the morning on
grass and hanging from spiders' vebs. Dew is dried by the sun's
warmth.
What is frost?
When the temperature falls below freezing point, the moisture in the air freezes into ice crystals and they settle on grass and plants. This is frost.
Frost soon melts and the moisture is dried by the sun.
Frost damages plants because the water inside the cells of a plant freezes and breaks the cells' walls. The frozen parts of the plant will die.
You can read more about this topic here
http://en.wikipedia.org/wiki/Dew
Acknowledge this source in your bibliography like
this:
Thomas, Ron. & Sydenham, Shirley. Dew
and Frost . [Online] www.kidcyber.com.au (2009)
Other weather pages on kidcyber:
Clouds .. Cyclones & Tornadoes .. Cyclone Tracy .. Ice .. Snow
& Hail ,,
Thunder &
Lightning ..
Wind ... Fun Weather Facts
July 2009 © kidcyber