In this activity, students observe, sort, and describe rocks based on their physical properties. Two Materials Included: Let's Rock and Report Mohs Hardness Cheat Sheet Preparation: Gather rock samples to be used. You could use a rock a mineral kit in your classroom. Number each rock. Procedures: Students will pick a rock, fill out their Let's Rock and Report lab sheet using Mohs Hardness Cheat Sheet. Standards: This lesson covers most physical attributes listed in state standards; shape