How much do you know about rocks? Well, if you are a bit unsure about distinguishing an igneous rock from a sedimentary rock you'll certainly be on solid ground after taking a tour through this feature created by Annenberg Media. Visitors can make their way through graphically-enhanced sections that include "Types of Rocks", "How Rocks Change", and "The Rock Cycle Diagram". In the "Types of Rocks" area visitors will learn about the basic types of rocks and they can even check out a handy chart that will give them some of the finer points of rock identification. The "How Rocks Change" area provides a basic overview of the processes involved with rock creation and transformation through a heady blend of Flash animations and straight-forward prose. Finally, the "Rock Cycle Diagram" provides an illustration of rock transformation over time. This site will be quite useful to educators and anyone who has peered at a rock and wondered: "How did you come to be?"