Sparks fly - lightning research - Brief Article
Science World, Oct 15, 2001
The odds of being struck by lightning are about I in 700,000. But University of Florida researchers claim those odds could increase as more lightning occurs due to warmer, wetter summers. The culprit may be global warming. Moist, warm air causes positive and negative electrical charges to separate between the top and bottom of a cloud.
In turn, the negatively charged cloud bottom repels electrons in objects on the ground, giving them positive charges. Electric current then flows between the oppositely charged poles to create lightning.
COPYRIGHT 2001 Scholastic, Inc.
COPYRIGHT 2001 Gale Group
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