A Hands-on Lesson in Rock Identification
Students will use their observation skills, knowledge of compositional features, and other clues provided to identify rock chips in a natural gravel. The chips are representative of 12 common rock types from the igneous, sedimentary, and metamorphic groups. Three larger rock samples, one from each group, are also included for comparison and analysis. Each set comes with a one-pound bag of gravel, sorting tray, forceps, magnifiers, testing tools, study guide, a teacher’s guide, and student copymasters, all contained in a convenient storage box. Average chip size: 3/8– 1/2".