This is the homepage for the Water Resources Division of the United States Geological Survey. It offers links to a variety of issues concerning water resources. The main links include: news, features, water data, publications and products, technical resources, programs, local information, and contacts. Also featured are links to other divisions within the United States Geological Survey, and FirstGov, ... Full description.

The Geography Network is a global community of governmental and commercial data providers who are committed to making geographic content easily accessible. The site provides an extensive collection of maps, searchable by theme (shaded relief, streets, population, rivers, etc.) or geographic area (continents, countries, or U.S. states). It also offers access to a large collection of geographic data, ... Full description.

This web site provides a searchable database of the noxious weed lists for all U.S. states and six southern provinces of Canada. The database can be searched by plant name, state name, or by clicking on a map. The search can be narrowed down to search for native, exotic, or all species of plants for a particular county. Furthermore, the search can be conducted for the time period that the user chooses. ... Full description.

Minfile contains geological, location and economic information on over 12,000 metallic, industrial mineral and coal mines, deposits and occurrences in British Columbia, Canada. This website can be used to find information on documented mineralization anywhere in British Columbia, to develop exploration strategies, for geoscience research, to evaluate the resource potential of an area, or for land-use ... Full description.

The Physics Zone offers lessons and tutorials for learning introductory level, algebra and trigonometry-based physics. General physics topics include motion (projectile motion), forces (rotation, torque, and others), work and energy, and momentum. Other topics include electricity and magnetism; waves, light, and sound; 'modern' physics (the atom, the Standard Model of matter, spectroscopy, and others), ... Full description.

This database provides access to information about dinosaurs. The reference area is searchable by genus, species, author, or year. Reference information includes a description of the dinosaur's name, information on its discovery, and some statistics (length, weight, diet, time span of the species). There is also a taxonomic classification, a brief description of the dinosaur, an an image (where available). ... Full description.

Since 1994, the Renewable Energy Policy Project and Center for Renewable Energy and Sustainable Technology (REPP-CREST) has been a pioneering force, publishing information about renewable energy, energy efficiency and sustainability on the Internet. Each type of renewable energy is represented by its own page, accessible from anywhere on the site, that describes the technology and features links to ... Full description.

Users can access imagery and other geographic information for the entire Earth. The system allows 'fly-ins' from space to an individual neighborhood, is searchable by address, and permits tilting and rotating of views to see 3D terrain and buildings. Users can create tours of places and include additional information about the place, photos, maps, and even student worksheets. The basic version is ... Full description.

This online multimedia encyclopedia, designed for younger and intermediate students, allows them to search information on the world's ecosystems, biodiversity, and organisms. Users can search by keyword, media type (photo, sound, video), type of organism (plant, mammal. etc.), or with the use of an interactive map that lets them select a region of the world. Full description.

The National Institute of Invasive Species Science (NIISS) supports a database with extensive information on invasive species around the United States. The data on individual species can be searched by scientific name, common name or National Resource Convervation Service (NRCS) Code. There is also a geographic search that allows users to locate invasives by state, county, National Park Service unit, ... Full description.