This site offers information on many aspects of water, including text, pictures, data, maps, and an interactive center where users can offer opinions and test their water knowledge. Main topics include: water basics, Earth's water, water use, and special topics such as acid rain, saline water and other water-quality issues. Links to other water-related sites are also provided. Full description.

This is part of the U.S. Geologic Survey's Water Science for Schools website. It consists of a set of links to other parts of the site dealing with groundwater-related topics such as groundwater flow and distribution, trends in groundwater use, importance of groundwater, and groundwater quality. Graphic illustrations and photographs are provided. Full description.

Watersheds are those land areas that catch rain or snow and drain to specific marshes, streams, rivers, lakes, or to ground water. This site allows users to locate their watershed by city, county, state, or region. Links provide information about stream flow, water use, conservation efforts, demographics, forest riparian habitats, science in your watershed, water discharges, and assessment of watershed ... Full description.

Geomorphology from Space is an out-of-print 1986 NASA publication designed for use by the remote sensing, science, and educational communities to study landforms and landscapes. Users can access a gallery of images consisting of 237 plates arranged by particular types of landforms such as tectonic, volcanic, planetary, and others. Photographs, locator maps, and sometimes a geologic map accompany the ... Full description.

This page describes El Nino and the Southern Oscillation and how they may contribute to severe weather and the destruction of sensitive ecosystems such as coral reefs. It features text, pictures, scientific illustrations, and links to satellite information and weather-related science activities. Full description.

At this site, users can access weather and weather-related maps. Subjects include outdoor activities, health and safety, weather details, gardening weather, and links to "Maps of the Week". Full description.

Students can use this map to track the progress of hurricanes and tropical storms in the western Atlantic Ocean and Carribean Sea. It includes descriptions of hurricane watch and warning conditions. Full description.

Users can choose from a large variety of maps for viewing, downloading, and/or printing. A set of quick links is provided to maps of current or general interest, and the remaining collection can be searched by country, continent, region, or theme. Links to other map sites are provided. Full description.

Visitors can check this U.S. map to see the locations of current weather watches, warnings, and advisories. Full description.

This interactive map and database provides information on thousands of stream and river gauges in the 50 States, Guam, American Samoa, and Puerto Rico. Users can access information on current flooding, drought, or other hydrologic conditions, forecast outlooks for stream and river flow, and archived historical data. Full description.