Presents a short study of igneous rocks and how they are formed, the various types of igneous rocks such as obsidian and pumice, and the importance of igneous rocks to the study of the earth.
Photographs, diagrams, and illustrations describe the various types of rocks that make up the rock cycle, how rocks are formed, how the rock cycle is linked with Earth's other cycles, and the importance to the Earth's environment.
Presents an introduction to the rock cycle, providing information on how molten lava from the earth's core is transformed into a piece of rock in a little boy's hand.
