In this mystery, students will explore how solid rock breaks apart into smaller pieces through a process called weathering (including root-wedging and ice-wedging). In the activity, students model the process of weathering that occurs when rocks tumble and crash into each other using sugar cubes in a container as an analogy. Classroom discussions and the activity lead students to discover that weathering is a process that changes the shape of the land. To find the lesson, go to the second grade lessons under the heading: Birth of Rocks. This is mystery#3: Will a mountain last forever? Note: This resource is free for a limited time. A paid account is needed for unlimited access.