This interactive diagram allows the user to follow a drop of water from the source through the treatment process. Water may be treated differently in different communities depending on the quality of the water which enters the plant. Groundwater is water located under ground and typically requires less treatment than water from lakes, rivers, and streams. Users are invited to click on each treatment ... Full description.

Students participate in two interactive exercises designed to help the user learn about river processes like discharge, flooding, and flood frequency. Each activity requires a person to make careful observations and measurements, do simple calculations, and answer questions about his or her work. A Certificate of Completion is available for printing at the end of each activity. Full description.

The Gulf of Maine Aquarium hosts this two-part activity. The focus is on seasonal changes in the mass balance of the Antarctic Ice Sheet. Part 1 uses an atlas and satellite imagery to examine the geography of the region and the changing boundaries of the ice sheet. Part 2 tracks annual changes in sea ice. There is an animation page showing changes in ice cover around Antarctica during 1991, and links ... Full description.

This is a comprehensive site that looks at many components of dams, including construction, destruction, and other issues. Access is organized into three levels by grade level. Information on cracks, case histories of the building and problems associated with some well known dams, and some real and imagined scenarios are included. Full description.

This is a well constructed curriculum module dealing with the water cycle. In this module, students first carry out a number of activities that demonstrate the concepts of evaporation, condensation, precipitation, and soil moisture and runoff. The students then construct a terrarium as a way to observe the water cycle as a whole. Immediately following this, students use the Internet to acquire real ... Full description.

This Amazing Space lesson is an interactive card game which helps students learn the properties of comets, asteroids, and the Sun and planets. As students answer questions correctly about the solar system, they collect cards. Background information is provided for teachers. Full description.

WhaleTimes will take young users on an adventure to the ocean. This resource provides a wealth of information and pictures on popular sea life, such as whales, seals, sea lions, sharks, penguins, and walruses. It helps the user to find out how animals survive in the sea, what they eat, where they live and much more. There are several computer activities for young kids, and a list of books that focus ... Full description.

The Federal Emergency Management Agency (FEMA) deals with natural hazards such as hurricanes, floods, national security matters, winter storms, etc. in a non-threatening scientifc and fun manner for children. The site includes animations, videos, games, quizzes and questions areas that address hazardous situations that children may face at any given time. Full description.

This site allows teachers to use data from ocean drifting buoys to integrate ocean science into their classroom science and math instruction. It offers educational activities and curriculum materials developed and tested by teachers. Lesson plans on currents, moving water, building and tracking drifters are also available. Alternatively, educators may opt to use only the data, background information ... Full description.

Virtual Earthquake is an interactive web-based program designed to introduce the concepts of how an earthquake epicenter is located and how the Richter magnitude of an earthquake is determined. Virtual Earthquake shows the recordings of an earthquake's seismic waves detected by instruments far away from the earthquake. The instrument recording the seismic waves is called a seismograph and the recording ... Full description.