Take the trip of a lifetime as you journey through the rock cycle. Be sure to pack your bags because this trip could take millions of years! Learn more about how rocks transform throughout the rock cycle while playing the game and understand the time spans involved. Explore the rock cycle in detail with an interactive diagram and learn about specific rocks. When you're ready, take the quiz to test your knowledge. With this pro version you have access to 2x as many questions as the lite version, access to 2x as many rock profiles and no ads!