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 archive of climatic data houses both national and global datasets as part of the National Climatic Data Center's (NCDC) mission to describe the climate of the United States and to maintain records regarding trends and anomalies of weather and climate. Users may search the archive by data type, national or global coverage, and time period; or by resource type, such as satellite, radar, models, ... Full description.

This page describes El Nino and the Southern Oscillation and how they may contribute to severe weather and the destruction of sensitive ecosystems such as coral reefs. It features text, pictures, scientific illustrations, and links to satellite information and weather-related science activities. Full description.

In this module, students will learn the concept of atmospheric pressure, how it changes with height, and how it is represented on maps. It consists of a set of links to each concept. Links to additional material are embedded in the text. Full description.

In this activity, students study the concept of atmospheric pressure and its role in generating winds and influencing day to day weather conditions. The activity consists of answering a set of questions by accessing keyword links to helper resources. Full description.

These diagrams illustrate what a pressure gradient is and that air flows from regions of higher pressure to regions of lower pressure. Links to additional information are included. Full description.

At this site, users can access weather and weather-related maps. Subjects include outdoor activities, health and safety, weather details, gardening weather, and links to "Maps of the Week". Full description.

The Convection And Moisture EXperiment (CAMEX) is a series of field research investigations sponsored by the Earth Science Enterprise of the National Aeronautics and Space Administration (NASA). CAMEX-3 collected data for research in tropical cyclone development, tracking, intensification, and landfalling impacts using NASA-funded aircraft and surface remote sensing instrumentation. At this site, ... Full description.

In this activity, students construct data tables and graphs of ozone concentrations for selected locations using TOMS data for the years 1979 through 1992. Instructions and TOMS images are provided. Full description.

This set of activities can be performed in the classroom or outdoors. Students will learn about atmospheric moisture, cloud formation, and precipitation by building and using their own instruments, making clouds in a bottle, and creating artificial "rain". Each activity includes materials lists, instructions for teachers and students, concepts, and learnable skills. Full description.