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.

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.

This site offers access to information on worldwide earthquake activity, earthquake science, and earthquake hazard reduction. Materials presented here include maps and information on recent activity in the United States or worldwide, news and highlights, and a link where users can report ground motion from an earthquake. For teachers, there is a set of quick links to photos, a slideshow, and USGS ... Full description.

Students can learn about the conditions necessary for hurricanes to form and sustain themselves. The discussion is accompanied by remote imagery and an animation showing how wind shear can retard the development of a hurricane. Links to more detailed information are embedded in the text. Full description.

Students can study the development of hurricanes as they evolve through a life cycle from a cluster of thunderstorms to a tropical depression to a tropical storm and then to a full-fledged hurricane. The characteristic atmospheric pressures at each stage of development are presented, and images of each stage are included. Links to more detailed information are embedded in the text. Full description.

Visitors to this site can access general information about earthquakes, such as frequently asked questions, seismic hazards, and building code information. Real-time information on specific events in western Canada is available in the form of maps and lists, and is updated hourly. For teachers, there is a set of links to background materials, computer and classroom activities, and seismic data. A ... Full description.

This biography of Admiral Harry Hess details his career in the United States Navy, during which he collected data on the seafloor, and as a geologist, in which he incorporated his observations on seafloor features into a hypothesis that the seafloor was spreading. 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.