Download Add to Favorites CREATE NEW FOLDER Share Students determine the hardness of two water samples, labeled only as A and B. Assesses their understanding of factors that affect water quality, including the hardness of water. Scoring rubric and background notes included. Grade: 6 | 7 | 8 | 9 | 10 Subjects: Science Electricity Electricity and Magnetism (Electromagnetism) Physics Ponds and Marshes Lakes Pollution Water Cycle, Ground Water, Rivers (Hydrology) Natural Resources Habitats and Ecosystems Ecology Biology Environmental Science Earth Science Geology + show tags TYPE: Activities Worksheets