jueves, 6 de septiembre de 2012
hurricanes !!!!!!!!!!!!!!!!
Hurricanes
begin as tropical storms over the warm moist waters of the Atlantic and Pacific Oceans
near the equator. (Near the Phillippines and the China Sea, hurricanes are called
typhoons.) As the moisture evaporates it rises until enormous amounts of heated moist air
are twisted high in the atmosphere. The winds begin to circle counterclockwise north of
the equator or clockwise south of the equator. The reatively peaceful center of the
hurricane is called the eye. Around this center winds move at speeds between 74 and 200
miles per hour. As long as the hurricane remains over waters of 79F or warmer, it
continues to pull moisture from the surface and grow in size and force. When a hurricane
crosses land or cooler waters, it loses its source of power, and its wind gradually slow
until they are no longer of hurricane force--less than 74 miles per hour.
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