The whirling winds of tornadoes can produce damage that ranges from broken tree limbs to a block of houses swept from their foundations. They can inflict utter devastation across a wide swath of land or, remarkably, destroy one house and leave others on either side largely untouched. In this interactive activity from NOVA, you will evaluate scenes of destruction utilizing the most widely used scale for assessing a tornado's intensity, the Fujita scale.
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