This video shows the retreat of the Laurentide ice sheet that covered much of North America from 18,000 to 8,000 years ago. Full description.

This website integrates video footage and information with lesson plans and activities to teach students about the rock cycle and rock types. Storytelling is used to help students understand the changes a rock undergoes as it passes through the rock cycle. These activities are intended to be used at the end of a unit on rocks and minerals. There are lesson plans for the activities with materials, ... Full description.

This resource presents a brief overview of these violent tropical ocean storms. It covers the science, phenomenon, and effects of hurricanes, and includes videos clips that depict how hurricanes form, what they look like, and what kind of damage they can do. Full description.

This resource provides information about the science, phenomenon, and effects of tornadoes. Video clips include an outing with a tornado hunter, an interview with a tornado survivor, and an animation depicting the science of tornado formation. Full description.

This site provides general information about floods and dams. There are sections on the science, the phenomenon, and effects of floods. One video clip shows the Mississippi River at flood and non-flood levels. Another clip shows actual footage of a flood wreaking havoc on a populated area. Full description.

This collection of video clips from the Caltech Woodframe Project shows what happens to a wood-frame house when it is shaken in the laboratory under conditions resembling those of an earthquake. There are both interior and exterior views, and also tests with furnishings in the house. The videos are available in two formats. There are also links to a description of the project, objectives of the testing, ... Full description.

This volcanoes site provides information about volcanoes as well as a classroom activity. There are video clips which show some of the features discussed, such as types of lava and eruptive styles. Topics covered by the text include how rocks melt, where and why volcanoes occur (plate tectonics), hot spots, volcanic hazards, forecasting eruptions and coping with risk. The classroom exercise involves ... Full description.

These interactive simulations allow students to investigate four of nature's more violent phenomena: volcanoes, earthquakes, hurricanes, and tornadoes. Each simulation begins with a brief written tutorial describing the characteristics and destructive potential of these hazards. Users may then adjust the various factors affecting the occurrence of these phenomena (for instance, ocean temperature, ... Full description.

This is the home page for the National Oceanic and Atmospheric Administration (NOAA). The goal of the National Oceanic and Atmospheric Administration is to describe and predict changes in the Earth's environment, and conserve and wisely manage the Nation's coastal and marine resources. This page provides access to the many component organizations, educational resources, and opportunities at the National ... Full description.

This resource explores earthquakes and seismic hazards, using the San Francisco area as an example. Materials include histories of San Francisco's earthquakes, including the 1906 'Great Earthquake' and the 1989 Loma Prieta quake. A section on quake basics addresses the relationship between earthquakes and plate tectonics, fault movements, seismic waves, and how earthquakes are measured. For educators, ... Full description.