In this lesson, find out about the life and vitality of oyster reefs in estuary ecosystems. Includes teacher and student materials for download.

This activity introduces students to the complex chemistry of estuarine water. Students investigate how chemical and physical water quality factors-pH, temperature, dissolved oxygen, and salinity-change and interact over varying time...

In this activity, students investigate a large watershed, look for sources of pollution in the watershed, and study the impacts of a rain storm on a watershed and estuary, without going on a field trip. Students investigate the nature of...

An overload of nutrients, called eutrophication (Greek for "good-nutrition"), can be harmful to estuaries. This phenomenon is also referred to as "over-enrichment," or "nutrient pollution". Students will investigate the range of...

Students investigate landforms and features associated with estuaries by taking a journey down a river to an estuary system where the river empties into the Gulf of Mexico near Weeks Bay. They will use Google Maps and other resources to...

Has general hydrology information, hydrology research updates, and data from the National Remote Sensing Center. A good site discussing current information from the world of hydrology.

Learn about the over 70 species of Cetaceans, or whales, dolphins, and porpoises in the ocean. Read about their behaviors, strandings, and their special sense: echolocation

What are pinnipeds? Learn about seals, sea lions, and walruses; their characteristics, where they live and their differences.

Find weekly, monthly, and 3-month climate maps for Russia and the Former Soviet Union. Includes total precipitation and minimum and maximum temperature.

The National Hurricane Center site contains a large body of information on hurricanes. From this site find out what a storm surge is, when the first record of a tropical storm was made. Go to the home page and find the latest forecasts.

This resource allows users to find sunset/sunrise calculations based on latitude and longitude for various locations. Provides a glossary of related terms and an explanation of their calculations.

"Imagine a baseball dropped from an airplane flying at 30,000 feet; imagine that baseball reaching speeds of 120 MPH as it falls to the ground; and imagine you're under it!" How does hail form? How big can it get? Read more here about...

Discover what experts view as the top weather related events of the 20th century, get background information on them and see photos. Some of the events covered are the Galveston Hurricane of 1900, the 1930s Dust Bowl, Hurricanes Camille...

"There are currently seven species of cetaceans in U.S. waters that are protected under the Endangered Species Act." This site provides links to each species as well as provides colorful and engaging pictures.

The National Oceanic and Atmospheric Administration provides a photo library of severe weather formations. Utilizing time-lapse photography, this photograph captures multiple cloud-to-ground lightning strokes during a nighttime...

The National Oceanic and Atmospheric Administration provides a photo library of severe weather formations. Using time-lapse photography, this image captures numerous cloud-to-ground lightning strokes during a nighttime thunderstorm in...

The National Oceanic and Atmospheric Administration provides a photo library of severe weather formations. Originally appearing in National Geographic Magazine, this photograph captures a lightning strike above Norman, Oklahoma.

The National Oceanic and Atmospheric Administration provides a photo library of severe weather formations. This photograph captures several lightning strikes during an early evening thunderstorm.

The National Oceanic and Atmospheric Administration provides a photo library of severe weather formations. This photograph of a hailstone is measured on a ruler to indicate a diameter of 6 inches (approximately the size of a grapefruit).