Visitors can access information on a variety of water issues in Arizona, including the Colorado River, riparian areas, water conservation, water rights, and recreation. The Arizona Water Resources Research Center (WRRC) provides a glossary of water terms, a stream gauge map and a directory of water-related agencies and organizations, especially Arizona Project WET (Water Education for Teachers). Other ... Full description.

This non-profit organization provides technical tools and services to community groups, local governments and others to protect streams, lakes, and rivers. The web site features publications related to watershed planning and management and provides summaries of community projects. Technical tools available include Vulnerability Analysis, Watershed Assessment, Rapid Stream Assessment Technique, Retrofit ... Full description.

This USGS site contains graphs, tables, and charts for the following ground water topics: What is ground water, ground water flow diagrams, importance of groundwater, and trends in ground-water use. Ground water quality, pesticides, aquifers, waterwells, artesian wells, sinkholes, and land subsidence are also covered. There are a variety of links within all of the above topics and a very complete ... 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 description of the El Nino pattern in the eastern Pacific is from NASA's Earth Science Enterprise. In addition to text and diagrams, it provides three weather related activities for lab or classroom. Full description.

This database of water-related educational materials contains information on 160 nationally reviewed curricula for grades K-12. The database can be searched alphabetically, by grade level, or by topic and/or instructional format. The information provided includes a detailed description, costs (if any), and contact information for obtaining a desired curriculum. Full description.

Relevant sections in this resource include What are Harmful Algal Blooms (HABs), an Introduction to Algal Blooms and "Red Tide", Algae Species (which algae are responsible for the harmful effects?), Adverse Impacts, Human Illness (food poisoning associated with harmful algal blooms & information on diagnosis and treatment), HAB Distribution Maps, HAB events in the United States and around the ... Full description.

The Antarctic ice sheet changes in size over the course of a year. When it is summer in the southern hemisphere, the ice sheet decreases in size. As the ice sheet melts, it releases fresh water into the ocean. In the southern winter (our summer), the ice refreezes, drawing fresh water out of the surrounding ocean, leaving the salt behind. These seasonal changes in the ice sheet are examined in this ... Full description.

The materials available here were brought together by government agencies, universities, non-profit organizations, and businesses in an effort to make Earth Science information accessible to a broader community. The Federation was established to make this a reality by encouraging and establishing the use of best science practices in the production of high quality data, information, products and services. ... Full description.