Noted Civil War historian Gary Gallagher offers this informative analysis of the Seven Days' Battles, the end of the Peninsula Campaign. Read about Robert E. Lee's strategy and the Confederate protection of their capital, Richmond.

By the end of this section, you will be able to define pressure in terms of weight, explain the variation of pressure with depth in a fluid, and calculate density given pressure and altitude.

This website provides a large collection of resources, many of them primary resources, for studying about the impact of the Great Depression on Washington State.

Read about the terrible destruction caused by the Johnstown Flood in May 1889.

The concept of interdependence in an ecosystem and its effect on the evolution of populations is further explored through a model of a dam. Students build a dam in the middle of the field, dividing the ecosystem in half to illustrate the...

A CNN image of massive flooding that occurred in Montreal on July of 1996.

The explanation of why the South Fork Creek dam broke causing the famous disaster. This is a transcript of an accompanying radio broadcast.

Read here about the infamous Rio Grande Rivers. This article includes information regarding its history and various facts and figures about it including its agriculture, major cities, dams and other issues.

Although designed for tourists, this site offers excellent photographs of the state highlights, such as the Grand Coulee Dam, Puget Sound, San Juan Islands, Seattle, Sokane, Columbia River, etc., along with brief captions. The maps have...

Describes the process of hydroelectric power generation very well. Includes drawings of turbines, pictures of actual turbines and a nice schematic of a dam/turbine system.

This site provides a detailed report on floods and flood plains. Facts about weather patterns, zoning restrictions, and dams and levees are given along with diagrams and photos.

Zoom in on everything from distant galaxies to the Earth's most interesting places! See the Pyramids, London, Hoover Dam, and more. Check for bald spots on the heads of the presidents at Mt. Rushmore. See how much the polar ice caps on...

Writer Nina Wegner travels to Altamira, Brazil, and talks to the fishermen who are struggling for their livelihoods. The world's third-largest dam, the Belo Monte, reaches peak construction this year, destroying their environment. She...

A site for all users interested in the engineering behind the building. Site engages users in a job that requires them to investigate troubled buildings and then figure out how to fix them.

[Free Registration/Login may be required to access all resource tools.] Overview of hydroelectric power and its consequences.

[Free Registration/Login may be required to access all resource tools.] Overview of hydroelectric power and its consequences.

This site from the National Humanities Center provides the story of the struggle to inhabit the West in spite of the dry climate. With questions for student discussion, online resources, scholars debate and bibliography.

Shana is learning about water. Help her discover all the different ways water can provide us with energy.

Discover the relationship between Pennsylvanians and the environment through this detailed, historical account which contains links to audio, video, pictorial images of the era.

Examine this historical account of the Johnstown Flood and how it impacted Pennsylvania's history.

"Staying in Phoenix" is a one page, nonfiction, reading passage about how settlers solved the water shortage problem for growing crops. It is followed by questions which require students to provide evidence from the story; it includes:...

Features basic information on the Colorado River including a map of the states it flows through.

This biographical sketch of Mary Cornelius Winder at the Oneida Indian Nation site describes the struggles of the Indian land claim movement.

This exploration of Flagstaff history focuses on life from a child's perspective using historically significant images and documents.