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NOAA
Noaa: Storm Prediction Center: The Online Tornado Faq
What questions do you have about tornadoes? This site addresses, among other things, common safety misconceptions and historic tornadoes, damage facts, and tornado research.
University Corporation for Atmospheric Research
Ucar: Make a Tornado
Students explore factors that influence why certain areas in the United States have more tornadoes than others and observe a model to visualize what is happening during a tornado.
PBS
Pbs Learning Media: Environmental Public Health: Natural Hazards
In this lesson plan, students are introduced to a variety of natural hazards and explore how understanding these threats make us better able to avoid or reduce their potential harmful impact.