Erosion, weathering and the rock cycle are big topics on the state test. Here is a great interactive from Learner.org that takes you through it all! There are animations to review how heat & pressure play a role with metamorphic rocks, how melting and cooling produce igneous rocks, and how sedimentary rocks form through the cementation of sediments. After you go through it all, be sure to take the 15 question quiz to test your knowledge! Print out your results for extra credit!