This interactive map of the US allows you to select among numerous streams and rivers to determine their current flow rate.

This large U.S. Geological Survey site offers a look at the age of the earth, how radiometric dating is used to calculate it, the major divisions of geologic time, and the classification and use of fossils.

This site provides a detailed discussion of the Earth's interior. Facts about the crust, mantle, and core are given along with diagrams of each. Also presents a table that lists the thickness and types of rock found in each part of the...

This site has everything you might want to know about surface water and things you probably didn't even imagine! Click Home to access the site in Spanish.

This resource from the United State Geological Survey provides data about San Francisco Bay's water quality. Data is displayed in time series plots, vertical profiles, longitudinal sections, space and time contours, and x-y scatter plots.

This U.S. Geological Survey website offers one explanation of why the ocean is salty. Click Home to access the site in Spanish.

Capillary is described and explained. It is related to surface tension. Examples in botany and human physiology are given.

The United States Geological Survey explains the creation and the uses of the National Map. The student can access the map and explore the United States in an interactive setting.

This comprehensive overview of continental drift takes a historical look at the various types of evidence which led to the development of the theory.

Discover how convection currents in the mantle are the driving force of continental drift. The reading also briefly addresses the scientists who laid the groundwork for this idea.

This site from the U.S. Geological Survey provides a definition of public water supply, classification of public water, a description of consumption, supply, and distribution of water, water quality, a small public water-supply system,...

Vivid descriptions on the life cycle of brine shrimp and ecology within the Great Salt Lake.

Describes where hot springs are usually located and why, and describes the discharge of hot springs. Also includes information on geysers and fumoroles (steam vents).

This map details the area around the Marshall Island seamounts. Seamounts are one of many features that are found in conjunction with abyssal plains.

Geology and chemistry of acid rain effects. Lots of building and monument pictures showing acid rain damage. Be sure to follow the "next" link at bottom of each page.

Part of an online publication offered by the U.S. Geological Survey, this articles sheds light on how studying fossils became an important part of understanding geologic time.

A remarkable website that provides satellite images of various places on earth from 1972 to present. The student can see and read about environmental changes to the earth's environment.

Learn about the movement of water from Earth's surface to the atmosphere with this site. Site describes the water cycle in words and with a diagram. Also explored on the page is the distribution of Earth's global water supply.

Provides information on the rockslide that occurred at Mount St. Helens on May 18, 1980. Site is in outline form.

This site from the U.S. Geological Survey provides great definitions of seven measurements that can be taken on water. Includes pH, dissolved oxygen, and turbidity. Click Home to access the site in Spanish.

Describes details of the earthquake of November 29, 1975 Kalapana in Hawaii, the tsunami, and the eruption of the volcano Kilauea as a result of the earthquake.

Site from the U.S. Geological Survey provides a brief list of volcano terminology including descriptions as well as links to major menus.

This site provides links to articles about natural disasters such as volcanoes, earthquakes, landslides, floods, etc.

Provides detailed information on Mount Baker as well as information on glaciers, hydrology, lakes and drainages and other points of interest.