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 learning system provides a variety of materials on Earth and space sciences, such as images, movies, animations, and data sets. Students, teachers, and the general public can access information on the sun and space weather, astronomy, our planet and solar system, current space missions, space-related mythology and art, and geology. For teachers, there are links to tools for navigating the site, ... 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 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.

In this activity, students construct a model of the seafloor, prepare profiles, and learn how ocean depth is measured. A materials list, instructions, engagement and explanatory information, and a vocabulary list are included. Full description.

These classroom activities cover topics such as sunspots, the solar wind, magnetic storms, auroras, satellite design, and impacts of solar activity on humans. Included are materials lists, instructions, concluding concepts, and links to related topics 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.

In this activity, students will learn how radar altimetry is used to measure sea surface height, and determine the direction and speed of ocean surface currents from TOPEX/Poseidon altimetry data. Procedures and materials are provided. Full description.

This lesson focuses on the effects of volcanic eruptions on atmospheric chemistry. Students will use the internet to acquire data, analyze it graphically, and perform further analyses on recent eruptions and on hypothetical eruptions of their own. Procedures, standards, and links to the necessary materials are provided. Full description.

In this activity, students construct models of the NASA Boeing 757 using the materials and instructions provided. Working in groups, the students fly their gliders in two challenge events involving launches and landings, experiment with altering the configurations of the gliders, and perform statistical analyses of flight data. Full description.