In the Clouds Photography specializes in photos of weather skyscapes taken by a photographer who is also an atmospheric scientist. Spectacular images of tornadoes, lightning, supercells, and other related severe weather are available, as are weather photos of a less severe nature;strange cloud forms and optical phenomenon such as rainbows, halos, and glories. Weather-related photos are a specialty ... Full description.

The NASA Visible Earth site is a searchable collection of images of the Earth taken by orbiting satellites. This section features a variety of images specifically illustrating effects of runoff. Each image is available in one or more graphic formats and sizes, and is accompanied by a description, as well as detailed metadata about how the image was obtained. Full description.

This is a single, stand alone image from the New York Times of a Glacier/iceberg flow. Location and other information is not provided. Full description.

Users can read and view pictures as part of a discussion of the positive and negative impacts of dam building on the streams, rivers, and watersheds in the United States and in Egypt. Conservation measures intended to increase the availability of water for fish and wildlife are outlined, and a link to the Dam and Reservoir Impact and Information Archive is provided. This archive is an extensive collection ... Full description.

Discover marine creatures from the tiny zooxanthellae that make the coral reefs home to the giant mammals of the vast seas. This resource provides very clear explanations and pictures to teach about the marine ecosystems of shorelines, temperate oceans, tropical oceans. Full description.

This site provides high level descriptions of aquatic plant life and excellent photos of common aquatic plants. Phytoplankton, macrophytes, fungi and lichens are also featured. While the text would be difficult for elementary children, a teacher could use this site for reference, and the photos would be of great interest to students. Full description.

This is a collection of high-quality photographs of Mars, showing evidence of water. Each photo is available in multiple versions, and is accompanied by a detailed description of what it illustrates. Full description.

This site explores the plant and animal communities that exist within an estuary. Specifically, it examines the planktonic, pelagic, benthic and intertidal communities, and focuses on organisms that are characteristic of the community, how scientists investigate these organisms, and why such organisms are important to the biological community of estuaries. Additionally, the site provides specific ... Full description.

This page presents a narrative history of the Colorado River Compact, which has provided the management framework for this natural resource since 1922. Full description.

This site contains information about snow, glaciers, permafrost, sea ice and cryospheric trends. The cryosphere is the portion of the Earth's surface where water is in a solid form, usually snow or ice. Seasonal snow cover, the largest component of the cryosphere, covers up to 33 percent of the Earth's total land surface. Glaciers and ice sheets cover about 10 percent of the Earth's land area. Nearly ... Full description.