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This computer simulation, designed for Earth science students, depicts pressure changes and air movement within the vortex of a tornado. The introduction explains the color coding and scale used in the model. Students can see that air pressure is lowest at the center of the vortex and in the portion that touches the ground. Marker particles indicate wind speed and direction. The height of the spinning winds is indicated on a metric scale, and students are invited to click a button to show comparison images of a barn and the Empire State Building. Movie controls allow students to repeat, pause, or step through the animation, which can give students more time to analyze the images. Copyright 2005 Eisenhower National Clearinghouse
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