Students use samples of four different types of igneous rocks to observe differences in texture, color, and grain size, and then make inferences about the relative cooling histories and silica content associated with each magma type.

A journey into the depths of a volcano teaches students about volcanic rocks, eruptions, features, and locations. Also find out how volcanologists monitor activity and conduct scientific research on eruptions.

This site offers a wealth of online textbook-related materials that encourage the discovery of science in the world around us. Enter the site to access material on specific topics. Each section contains reading material (complete with...