This site describes volcanic features and phenomena generated by volcanic eruptions. It discusses eruptive products, which are highly variable and largely dependent on the composition, viscosity, and gas content of the erupting magma. In addition to the general discussion on lava flows there are links to detailed discussions on lava flow types and features along with specific information on basaltic, ... Full description.

This resource for younger students about the greenhouse effect and global warming is part of a series of information sheets about the atmosphere, climate, and the environment. It begins with an explanation of the natural greenhouse effect of our atmosphere and the enhancement of the effect by the addition of greenhouse gases. The effects of this global warming on the weather, sea level, farming, and ... Full description.

This is the Student Page of an activity that teaches students how and why magma moves inside volcanoes by injecting colored water into a clear gelatin cast. The Student Page contains the activity preparation instructions and materials list, key words, and a photograph of the experimental setup. There is also an extension activity question that has students predict what will happen when the experiment ... Full description.

This is the Teacher Page of an activity that teaches students how and why magma moves inside volcanoes by injecting colored water into a clear gelatin cast. Activity preparation instructions are on the Student Page, while the Teacher Page has background, preparation, and in-class information. An extension activity has the students repeat the experiment using a square bread pan to simulate the original ... Full description.

Lava flows and their effects on areas surrounding volcanoes are explained in this United States Geological Survey (USGS) publication. Examples are sited from the Kilauea and Mauna Loa volcanoes in Hawaii, and the Unzen volcano in Japan. The site also links to specific case studies of lava flow destruction. Full description.

This United States Geological Survey (USGS) website covers general information about lahars and their effects on areas surrounding volcanoes. Information given includes a description of lahars, what triggers a lahar, and the economic and environmental damage they inflict. Links to USGS websites documenting specific lahar case studies are found throughout the page. Full description.

This site focuses on the subject of volcanoes, including how volcanoes form, the destruction they can cause, effects of volcanoes on the environment, where active volcanoes are found, volcanoes of other planets, and the different volcano types. Designed as an electronic tour, it guides the user through different web sites and outlines teaching objectives, concepts covered, and new vocabulary. There ... Full description.

This lesson focuses on the effects of volcanic eruptions on atmospheric chemistry. Students will use the internet to acquire data, analyze it graphically, and perform further analyses on recent eruptions and on hypothetical eruptions of their own. Procedures, standards, and links to the necessary materials are provided. Full description.

This animation clearly shows the ozone around Mt Pinatubo reacting to the eruption. A large ozone hole appears during the eruption and sweeps westward along with the ash cloud,stratospheric sulfur dioxide, and stratospheric sulfuric acid H2SO4. Full description.

A comprehensive overview of the U.S. Geological Survey's Volcano Hazards Program and current volcanic activity in the United States. The Volcano Hazards Program monitors volcanoes and collects the best possible scientific information on volcanoes in the United States and elsewhere to reduce the risk from volcanic activity. Site includes links to the Program's four volcano observatories in Alaska, ... Full description.