This activity is an active simulation of an explosive volcanic eruption. The model volcano is a plastic 35 mm film cannister that erupts (the lid blows off) when gas pressure generated by dissolving alka seltzer is sufficiently high. It is realistic in that the timing of the eruption is difficult to predict precisely and in that the eruption occurs when the pressure of the gas exceeds the confining ... Full description.

In this Web-based, interactive story, Tutangiaq (Too-tang-geye-ack - nicknamed 2T), a Canada Goose, flies across Alaska looking for his family. As he flies, he tells students about the 49th state. Students learn several facts about the state, including how Alaska was purchased from the Russians,. They can also compare the size of Alaska to other states. 2T takes a flight across the volcanic chain ... Full description.

This site covers the geology and volcanology of Iceland. Iceland is home to numerous volcanoes with diverse eruptive styles. This research institute studies these volcanoes, including their eruptive histories, lava petrology, the chemistry of the volcanic gasses and the after-effects of the eruptions. For each eruption since 1996, there is a daily chronicle with photographs and maps. New information ... Full description.

This product provides an introduction to understanding and interpreting satellite images. Beginning with two short chapters on visible satellite images and radiation, the book then covers six key Earth-atmosphere variables on topics including the Antarctic ozone hole, El Nino, deforestation, the missing carbon dilemma, and the effects of sea ice, snow cover and volcanoes on atmospheric temperatures. ... Full description.

These on-line, problem-based modules address events such as volcanoes, hurricanes, dinosaur extinction theories, deforestation, endangered species, and global climate change. The site uses NASA remote-sensing images and includes a tutorial about how to analyze Landsat images with NIH Image. Full description.

This site introduces the several methods geologists use to monitor changes in a volcano. These methods assist in forecasting intrusions and eruptions and consist of ground movements, seismicity, gas geochemistry, and geology. As a result of this lesson, students will realize that eruptions have precursor activities, recognize patterns in volcano behavior, and interpret graphical data. This site includes ... Full description.

This site presents educational modules for teaching about earthquakes, volcano eruptions and related plate tectonic concepts using an interactive computer program for mapping called Seismic/Eruption (also called SeisVolE). The program includes up-to-date earthquake and volcanic eruption catalogs and allows the user to display earthquake and volcanic eruption activity in "speeded up real time" on global, ... Full description.

Astro-Venture is an educational, interactive, multimedia Web environment highlighting NASA careers and astrobiology research. This guide ? one of four - covers geology. Students in grades 5-8 role play NASA occupations and use scientific inquiry, as they search for and design a planet with the necessary characteristics for human habitation. Using an online, multimedia module, students make changes ... Full description.

This United States Geological Survey (USGS) on-line publication discusses volcanic ash fall in terms of composition and effects. This report discusses the negative effects of volcanic ash fall on machinery, human health, weather and man-made structures, using the Mount Saint Helens eruption of 1980 as an example. The composition of volcanic ash is discussed, as well as ancient and modern ash falls ... Full description.

This on-line book, published by the United States Geological Survey (USGS), covers the 1980 eruption of Mount St. Helens in Washington state. There is a discussion of the events leading up to the eruption, as well as an explanation of the mountain's volcanic history. Immediate effects are covered, including the ash falls, pyroclastic flows, and debris. Post-eruption topics include subsequent activity ... Full description.