A phase diagram shows the preferred physical states of matter at different temperatures and pressures. This phase diagram shows these states for water. Critical points, triple points, and ice phase processes are defined and illustrated as a function of pressure and temperature. The diagram is accompanied by a set of tables that give detailed thermodynamic data for the triple points and structural/crystallographic ... Full description.

This educational resource describes the science behind volcanoes and volcanic processes. Topics include volcanic environments, volcano landforms, eruption dynamics, eruption products, eruption types, historical eruptions, and planetary volcanism. There are two animations, over 250 images, eight interactive tests, and a volcano crossword puzzle. Full description.

This Web site brings together scientific content on Earth and space sciences with interdisciplinary content on the arts and humanities. Three levels of content are provided: students (K-12 through undergraduate), teachers, and browsing adults. The site includes documents, images, movies, animations, sounds, games, and data. Full description.

The activities in this 16-page magazine encourage children to look more closely at geology in their local environments and support their exploration of a range of dynamic Earth processes. Full description.

This multi-curricular, image visualization tool allows students to maneuver through huge image data sets, overlay and compare images gathered over time, or with different instruments, and observe historical, geographical, geological, and environmental change or to compare images of the same area at different wavelengths. DataSlate includes a CD-ROM (with 12 sample data sets and 12 sample lesson plans), ... Full description.