Yellowstone Erupts! Fill-in the Blanks worksheet with key. Another version of a puzzle to use on vulcanology, geology, seismic waves, catastrophic events and Earth sciences. This worksheet is a companion to the Discovery Channel's Supervolcano 3 hour program, which is a great supplemental video for a unit on volcanoes. My students rave about it, I use it at the end of the year over a 3 day period, they watch, I figure grades! By Maura Bostwick Neill.