NOAA's 2004 Submarine Ring of Fire expedition's goals are to examine over a 1,000 km stretch of submarine volcanoes and sea-floor hot springs in the Mariana Island Arc. At this website, users can find general information about the Mariana Arc, the research, and the scientists involved. Educators can find intriguing lesson plans about volcanoes and the chemistry of hydrothermal vents for grades fifth through twelfth. The site presents fascinating materials about seafloor mapping, volcanism, and vent chemistry. Visitors can view amazing satellite images of the overall Mariana Arc Volcanic Chain, its sea floor, and the NW Uracas and Ahyi submarine volcanoes.