Fog
in San Francisco!
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When warm air cools, water vapor condenses to form a mist. When this mist is on the earth's surface it's called fog. Fog forms off the coast of San Francisco. Air in the coastal valleys of the Bay Area and the Central Valley of California heats up during the day. The air in these locations expands and rises. This displaced air must be replaced. Air is sucked from offshore where fog has formed, and in through the Golden Gate. San Francisco just happens to be in the path of this "replacement air." The fog gets carried along as the air makes its way towards the hotter areas. Below are a some links that can be made into a lesson. |
