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 lithograph provides a full-disk view of Earth photographed by Apollo 17 astronauts, Dec. 7, 1972. The accompanying text describes the view seen in the photograph and the circumstances in which it was taken. Suggestions for activities in which the photograph can be used are also provided. Full description.

The rocks and sediment collected by Apollo astronauts contain vital clues to the formation of Earth and the Moon. Most of this information, including crucial parts of the history of Earth, cannot be learned by studying rocks on Earth because it is so geologically active. Teachers may use these materials to teach lunar geology and landforms, rocks and minerals, and the history and future of lunar exploration. ... 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 educational brief provides an overview of the types of solar activity and their potential effects on Earth, along with brief descriptions of some spacecraft and instruments that are used to study solar acvtivity. Links to a glossary and to additional information are included. Full description.

This NASA educator guide tells the story of why it is important to observe celestial objects from outer space and how to study the entire electromagnetic spectrum. It features a set of hands-on activities and demonstrations which can be performed by teachers to reinforce the concept that Earth's atmosphere interferes with the passage of electromagnetic radiation and to investigate the properties and ... Full description.

In this activity, students create a model ocean over which "wind" will be blown, and observe the relationship between the wind and the resulting ocean surface currents. The activity reinforces the concept that surface currents in the ocean are mostly caused by wind. A materials list and instructions are provided, and links to a glossary are embedded in the text. Full description.

This brief description of the rock cycle is for younger students. They will learn about the processes by which the three types of rocks can be changed into one another. Full description.

Students can learn about the plants, animals, climatic conditions, and geographic locations that constitute the various biomes and ecosystems of the world. Full description.

Using this kit, students may construct paper models of the Hubble Space Telescope, the Chandra X-Ray Observatory, and the Compton Gamma Ray Observatory. Parts sheets for printing, instructions, and a list of other required materials are included. Links to other related sites are also provided. Full description.