Download Add to Favorites Add to Folder creative writing children's book activities Create new folderCREATE NEW FOLDER Share Review pH indicators with the fill-in-the-blank questions in this physical science printable. As a skill challenge, students identify and compare descriptions of an acid and a base. Grade: 9 | 10 | 11 | 12 Subjects: Science Chemistry Chemical Mixtures and Solutions + show tags TYPE: Worksheets