Students learn about the giant impact hypothesis for the Moon's formation, and how the Apollo Moon rocks have contributed to scientists' understanding of the Moon.

Instructional module focusing on minerals. Discussion includes chemical composition, chemical structure, and the formation process. The site also includes an interactive practice quiz and links relating to the topic.

Geologists generally know the age of a rock by determining the age of the group of rocks, or formation, that it is found in. The age of formations is marked on a geologic calendar known as the geologic time scale. Development of the...

Everything you need to know about sedimentary rocks and the processes by which they are created, including weathering, soils, environments, and classification.

Photos, illustrations, 3D graphs and animations are part of this investigation into the geology and landforms of the Grand Canyon. Learn detailed information on the formation of the canyon, the rock layers, and the prehistoric life that...

This resource explains the depositional processes that occur in sedimentary rock formation to produce stratification, cross-bedding, graded bedding, rippled effects, and solidified mud cracks. Includes photographs of each type.

This National Park Service site has information about these fossil beds in Nebraska and where the name Agate came from.

This article gives a detailed explanation of how transgression and regression of sea levels work to create deposits of sedimentary rocks. Illustrations show the layering that takes place over time. The article discusses how geologists...

Material to begin an exploration of plate tectonics and mountain formation. An hour-long video is accompanied by learning goals, an outline and overview, details on metamorphic rocks and mountain building, and ideas for teaching this...

Winslow Homer is profiled at this site in a format that begins with a biographical sketch of his life. His works are then listed by appearance in the museum's database. Each work is presented in thumbnail format with brief information...

This resource gives short descriptions of how sedimentary deposition occurs in rivers, lakes, river mouths, coral reefs, glaciers, arid environments, and tropical environments.