Frey Scientific Substance Classification Kit

Students design a dichotomous key to identify each of 6 white powders in a set through their observations and data from tests with assorted reagents. Allows students to investigate and recognize similarities and differences in chemical properties of various substances when mixed with water, vinegar and iodine solutions. Contains additional activities to further develop observational and classification skills of students. Includes teacher s guide and student worksheets. Materials for 24 students working in 6 groups of 4