This is a comprehensive site that looks at many components of dams, including construction, destruction, and other issues. Access is organized into three levels by grade level. Information on cracks, case histories of the building and problems associated with some well known dams, and some real and imagined scenarios are included. Full description.

This CD-ROM is a reproduction of the out-of-print textbook by the same name developed for the undergraduate to graduate level Earth systems science major to study landforms and landscapes. It presents in-depth coverage of geomorphology as a discipline and the use of satellite imagery in observation, study, and interpretation. It contains a gallery of 237 color and black and white plates of space imagery, ... Full description.

The Darby Creek watershed encompasses an area of approximately 550 square miles in central Ohio. The Big and Little Darby Creeks are well known for their vast diversity and abundance of aquatic and terrestrial plants and animals. They are home to eighty-six species of fish, five of which are endangered. Forty-one species of freshwater mollusks live in these waters, eight of which are on the Ohio endangered ... Full description.

Solar cells have varying amounts of effectiveness depending on factors such as latitude and cloud coverage. For example, locations with more cloud coverage will produce less solar energy. By comparing the monthly averages of surface downward radiation in various locations around the United States, students can analyze areas that would be more or less beneficial to having solar panels per month. This ... Full description.

GIS enables students to geo-reference multiple data sets creating layers. This essentially becomes a vertical profile of data, information, photographs etc. that when viewed as a body of information can present a fairly comprehensive view of that location. Based on data associated with latitude and longitude, students now have the ability to examine geo-referenced data sets derived on Earth, and from ... Full description.

There are many factors that affect an area?s climate. By understanding these factors, someone could predict the average temperature, temperature range, and precipitation patterns of an area. They could also predict the type of vegetation likely to grow in an area based on these atmospheric conditions. In this activity, students will work in groups of three. Each group will be assigned one of six sets ... Full description.

For ecologists, the horseshoe crab is an important creature- a vastly adaptable organism that predates most species on the planet, with a lifecyle that is interlocked with other animals. Users can view information, photographs, and diagrams that explain the anatomy, range and habitat, lifecycle, ecological niche, reproductive cycle, and medical uses of the horseshoe crab. Full description.

This resource ties together physical and biological aspects of ocean color for high school students. Specific sections discuss life in the oceans, the appearance of the ocean from space, phytoplankton (the little link in a big food chain), carbon (where does it go?), and the Earth as a giant greenhouse. There are also activities that accompany these lessons. Full description.

This PowerPoint is a resource for museum educators that highlights the major mission information and science background for the Interstellar Boundary Explorer (IBEX) Mission, a Small Explorer Earth-orbiting spacecraft that is designed to map the distant boundary between the solar wind from our Sun and the interstellar medium. This PowerPoint supports a full-length planetarium show about the IBEX mission ... Full description.

This interactive demonstration explains how the Interstellar Boundary Explorer (IBEX) spacecraft uses its particle detectors to collect and sort particles that come from the boundary of the Solar System. Full description.