Types of volcanic eruptions are named after actual volcanoes. View the eruptions of these volcanoes.

Describes what a volcano landslide is, how they occur, the effects of these landslides, and case studies.

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.

This is a website to learn not only about the inner and outer core, but also about the crust and the mantle of the interior of the earth.

Mercury in the geochemical cycle ultimately affects the food chain. Learn about this and its effect on the Everglades.

At this site from USGS you can view pictures and resources on the volcanoes located in the Cascade Mountain Range. Experience their beauty and splendor as you learn more about these volcanic mountains.

Check out this animated site of a hydroelectric generator. There is a picture of a real generator along with a description of how it works.

The USGS explains the definition of a river and how a river is supplied with water. Included is a cross section of a river. Click Home to access the site in Spanish.

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

Through the wizardry of online cams, you can view major volcanos around the world.

The USGS reviews the differences between lakes and reservoirs. They discuss the history of freshwater and salt water lakes. Click Home to access the site in Spanish.

This site provides a discussion of the physical properties of water. Click Home to access the site in Spanish.

Site delves into magma, lava and lava flows. Provides numerous links for additional references.

This site features information and related links that can be used by students and scientists to understand the events that led to the December 2004 Indian Ocean tsunami.

The USGS provides the facts and figures on 2004's earthquakes, which is the second most fatal in recorded history.

Mauna Loa means long mountain, and it is the largest and most active volcano on earth. Get some good overall facts regarding this infamous volcano.

The USGS provides an extensive section of information about tsunamis. The items presented are the basics of tsunamis regarding the Great San Francisco earthquake of April 18, 1906, tsunamis in the U.S. Pacific Northwest, and the 1998...

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.

Find the latest research and publications on the subject of energy, in particular: oil, gas and coal resources.

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.

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