A chronicle of the eruption of Mount Pinatubo in the Philippines. Click on Fire and Mud Contents at the bottom of the first page to see the contents of this report.

You will find this list of questions interesting and amusing. "Things like, "Is salt water used for anything in the U.S.?," and How can we have a 100-year flood two years in a row?", are found on this this. Click Home to access the site...

Wells are extremely important to all societies. Find out how wells are dug today and peruse the list of the different types of wells and the methods used to dig them. Click Home to access the site in Spanish.

A massive amount of information about groundwater. Topics covered include groundwater basics, humans and groundwater, groundwater quality, and its place in the water cycle. Includes true-and-false quiz and a Q&A section, as well as a...

The United States Geological Survey offers a complete look at water science in glossary form. Take advantage of the topic guides at the top of the site. You'll find great maps, clipart and activities centers. Click Home to access the...

A quick summary of the water cycle that includes a diagram of the cycle, with links to in-depth explanations of each component of the cycle. Click "water-cycle home" to access water-cycle resources in a variety of languages.

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.

Learn about acid rain and the devasting effects it has on the U.S., particularly on our nation's capital and monuments.

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

This site contains information about we have learned about the San Andreas Fault since 1906.

This US Geological Survey site briefly discusses the basics of why pesticides are increasingly found in our ground water. Click Home to access the site in Spanish.

This U.S. Geological Survey website explains the desalinization method used by some communities to change sea water into drinking water. Click Home to access the site in Spanish.

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

Resource is a brief explanation of an aquifer and how they work. This article also touches upon artesian wells. A picture and a fun activity to illustrate the concept of an artesian well are included. Click Home to access the site in...

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

This U.S. Geological Survey website explains a variety of uses for saline water. Pie graphs and bar graphs are used to illustrate the various uses. Click Home to access the site in Spanish.

Describes the formation of rivers and the transport of soil and sediment. Links to related material is provided within the text.

This site from USGS describes the importance of ground-water, provides a map of ground-water use (by state), a map of the percent of total withdrawals coming from ground water, and a map of the percent of public-supplied population...

Locate glaciers and ice caps on a world map at this USGS site. Read about the formation of galciers and other interesting facts. Learn about the effects glaciers have on the landscape, and of their importance for our fresh water supplies.

Learn about the importance of water quality and environmental influences that reduce it.