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In this weather activity/demonstration, learners watch as a ping pong ball is suspended in a stream of air supplied by a hair dryer. This demonstration of the Bernoulli Principle models how updrafts (wind) supports hail and rain in clouds during storms. The discussion portion of this resource explains the science behind this phenomenon as well as how and why the National Weather Service issues thunderstorm and tornado watches. Thunderstorm safety rules are also included in this resource.
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