Expand your knowledge of
the concepts presented in this chapter by using the CD-ROM to answer the following
questions.
Using the Pegmatite Pocket
module of the CD-ROM, answer this question: Pegmatites are composed of very
large, often dramatic crystals. Why do these crystals grow so large?
Spreading Ridge module,
Iceland, Eruption Footage: Think about the rock cycle as you watch Surtsey
form. What portions of the rock cycle are captured in this video?