It takes a long period of time to make soil. The glass will be cracked because when it froze, it expanded or pushed out. The water became larger than the jar. Water in the rocks pushes out when it freezes thus causing the rocks to break. Students compare different rocks and their textures after they have been weathered.
Students take different kinds of rocks together in a can and shake for several minutes.
Tell students to take tops off of can and ask them to tell you how the rocks look different. Research rock collecting. Write a paragraph explaining the rock soil cycle, including some natural soil creators and some man-made soil makers. The University of Tennessee at Martin is not responsible for the information or views expressed here.