This downloadable booklet provides an overview of wetlands for younger students. Topics include what a wetland is, plants and animals that inhabit them, the many terms (marsh, swamp, etc.) used to describe them, what to do when visiting wetlands, and what functions wetlands perform in the environment. Full description.

This table presents the modified Mercalli Intensity Scale (MMI), a measure of earthquake intensity based on shaking severity and observed effects of earthquakes. It includes MMI value, a description of shaking severity, and a summary and full description of damage effects. Each MMI value is accompanied by an illustration showing its expected effects. Full description.

Why are there sedimentary or igneous or metamorphic rocks in your backyard? What is the underlying geologic story that explains the shape of the world around you? The Teacher-Friendly Regional Geology Guides provide teachers with the tools to incorporate regional and local geology into the classroom. Using geologic history as a framework, the Guides examine rocks, glaciers, fossils, topography, minerals, ... Full description.

This collection of meteorological tutorials comes from the Central Institute of Meteorology and Geodynamics (ZAMG) in Vienna, Austria. The ZAMG has a broad range of research and publication activities, from daily forecasts to earthquake and geomagnetic research. This collection covers many weather phenomena, explaining behavior and relationships in hyperlinked lessons that feature many diagrams and ... Full description.

There are currently millions of man-made orbital ruins that make up "space junk". Space junk can be anything from hatches blown off space modules, paint fragments from the space shuttle, or satellites that no longer work. On this website you will help to capture junk that's floating out there in space. Each time you capture junk, you also find a short description of the junk, how it arrived in space ... Full description.

This tutorial contains animations that illustrate factors related to seasons on Earth. There are two sets of animations. The first set establishes viewpoints for observing the seasons and the second set studies the seasons on a planet with a 40-day year. In some of the animations, the user can control variables such as time. There is also a PDF file that features a learning guide about the Seasons ... Full description.

America has 95,000 miles of coastline. In this collection of images from NOAA, the user can view images of America's coasts and adjacent coastal regions. Images include early Nineteenth Century sketches and drawings and modern photographs of waves, rocky shores, sandy beaches, marshes, mangroves, seaside villages, and port cities. Full description.

This site is part of the Gulf of Maine Aquarium, and focuses on stream environments in Maine. Topics include: Maine's Water Roots, which looks at the human history of Maine as it can be traced along its waterways; What is a Stream?; Life in the Mainstream, Living on the Edge; A Role for Everyone, and Bibliography. Concepts addressed include water quality, watersheds, the hydrologic cycle, aquatic ... Full description.

This site contains various kinds of textual information and imagery of Emiliania huxleyi, an armour-plated, photosynthesizing, single-celled marine phytoplankton and dominant coccolithophore in the ocean. Numerous summaries of the species are provided, including information on its occurrence, global distribution, effects on the carbon cycle and global climate, calcification, vital statistics, cellular ... Full description.

The Challenger Center was founded by family members of the Challenger 51-L crew to continue the crew's educational mission to use students' natural enthusiasm for space to create innovative learning experiences. Teacher and community resources are available in the form of clip art, student activities, teacher workshops, electronic fieldtrips, and classroom programs pertaining to comets, Mars, the ... Full description.