This site offers information on many aspects of water, including text, pictures, data, maps, and an interactive center where users can offer opinions and test their water knowledge. Main topics include: water basics, Earth's water, water use, and special topics such as acid rain, saline water and other water-quality issues. Links to other water-related sites are also provided. Full description.

This site provides an explanation for cloud formation and seeks to correct myths or misconceptions about how clouds form. Water vapor, condensation, and evaporation are discussed in the context of dew-point temperature and saturation. Educators and anyone explaining cloud formation will find hints on how to present the correct information and avoid misinforming their audiences. Full description.

This site was designed to provide explanations of some basic cloud forms and access to detailed pictures of representative examples of each type. Full description.

This lesson plan introduces very young students to measurement, graphing and estimation. Full description.

This site provides multiple access points to all types of El Nino data. It describes both El Nino and La Nina conditions, as well as the impacts of an El Nino event and the benefits of El Nino prediction. Through this portal site one can also find information on current El Nino conditions and forecasts, the instrumentation used in the scientific study of this phenomena, and links to both El Nino animations ... Full description.

Clouds comprise a wonderful focus for classroom study. They're ubiquitous, ever-changing, scientifically interesting and, most importantly for teachers, they're cheap. The material presented here includes sections on cloud formation, cloud types, cloud pictures, other cloud-related phenomena, and a glossary. Full description.

This activity is designed to teach students about the different classes of clouds, as well as how they are classified. Students will learn about classification by performing their own classification of clouds based on information given them by instructors. Students will also use infrared ATP images to study clouds by height, temperature, and appearance. Full description.

This site facilitates a classroom activity in which students create a hypothesis on cloud formation and then conduct online research to either validate or refute their initial hypothesis. The activity begins with a brief laboratory experiment that demonstrates cloud formation and asks students to generate a hypothesis on how clouds form. The activity then switches to students conducting Internet research. ... Full description.

This collection of imagery and visualizations is derived from the geosynchronous and polar orbiting environmental weather satellites administered by the National Oceanic and Atmospheric Administration's (NOAA) National Environmental Satellite Data and Information Service. Other sources include the European Organization for the Exploitation of Meteorological Satellites (EUMETSAT) and The National Space ... Full description.

This site covers many of the components of cloud formation and cloud types. Although written for the high school level, the middle school student could grasp most of the concepts with the assistance from the teacher. Specific concepts covered include the importance of and mechanisms that produce rising air, cloud types, and ptyes of precipitation. There are nice graphics and images to support the ... Full description.