Students are first show photos of tornado damage. Recently, the Oklahoma tornado is a good source at CNN.

Using the whyfiles page above, students record the pressure differential and compare that to the wind speed and F scale using a simple spreadsheet. When graphing the columns, it becomes quite clear that slight changes in pressure differential creates large changes in wind speed.

Next, students are re-directed to another YouTube video of a destructive tornado.

.  © Brad Edwards 2016