US Geological Survey
Usgs: Volcanic Hazards, Features, and Phenomena
Site from the U.S. Geological Survey provides a brief list of volcano terminology including descriptions as well as links to major menus.
Annenberg Foundation
Annenberg Learner: Volcanoes
This interactive from Annenberg Learner asks the question of whether erumptions of volcanoes can be predicted. Review what you already know about volcanoes, and move on to forecasting potential. Several short video clips are included as...