This poster, first printed around 1998, focuses on the topic of space weather. The front gives overview images and the back tells the story of Sun-Earth connections with additional images. It also contains an educational activity. Full description.

This poster depicts the Galaxy at radio, infrared, optical, x-ray, and gamma-ray wavelengths. Captions describe the Milky Way and what can be learned about the Galaxy from measurements made in each segment of the electromagnetic spectrum. Full description.

An interactive slide show explores the journey of a single snowflake onto and through a glacier. This journey, which can take as much as 30,000 years to complete, shows that the life cycle of a glacier can be more complex than originally perceived. Full description.

This report discusses how natural processes and human activities affect the interactions of ground water and surface water, and the importance of considering ground water and surface water as a single resource. Topics include natural processes of ground- and surface-water interaction; chemical interactions; and the effect of landscapes on these interactions. There is also discussion of the effects ... Full description.

These illustrations and accompanying descriptions outline the basic concepts of groundwater aquifers. Users may learn definitions of basic terms (aquifer, confined, unconfined, water table) and see how the properties and orientations of rock layers act to accumulate water, which can then flow out or be pumped out by a well. Full description.

Groundwater is an important and bountiful source of fresh water for irrigation, industry, and drinking. This resource covers basic concepts of the hydrologic cycle, hydrogeology, supply and demand, and contaminants that can affect water quality. Suggestions for community action to help protect and conserve groundwater are outlined, along with federal, state, and local programs that are now in place ... Full description.

This set of introductory materials outlines the basic concepts of groundwater and hydrology. Graphics with accompanying definitions explain basic hydrologic terms such as aquifer, recharge, and discharge. There are also news articles, a reading list, a questionnaire, and a quiz. Full description.

Hydrogeology deals with the occurrence, movement and quality of water beneath the Earth's surface. Materials presented here outline the basic terms and principles of hydrogeology. Users can read text and view pictures that explain groundwater, wells, and aquifers. The final section discusses the possible consequences of excessive withdrawal of water from an aquifer. Full description.

This site features a series of Flash-based animations on several aspects of the San Antonio Water System. Although regional in focus, the topics are broadly applicable. They include: the hydrologic cycle, aquifer structure and function; non-point-source pollution, fresh water distribution, waste water treatment, aquifer storage and recovery and household water conservation. There are also links to ... Full description.

This three-part module covers the major concepts of the chemistry of water, at a level appropriate for late primary and early intermediate learners. Key vocabulary words are defined using examples that are relevant to children's lives. Each part of the module contains an activity or experiment to reinforce the science content that was covered. Full description.