Ppm bottle demonstration
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A traditionally difficult concept to visualize, parts per million becomes crystal clear with these two clever teaching aids that illustrate concepts of concentration, ppm, and environmental pollutants. The PPM Concentration Bottle contains one million tiny beads but only one white bead. Other colored beads represent 10 ppm, 100 ppm, 1000 ppm, 1%, and 10% concentrations in addition to blue beads that represent the solvent. When your students start to look for the 1ppm and 10ppm beads, they will see first-hand that these values are extremely small. PPM Needle in a Haystack Bottle contains one million tiny yellow beads and just one blue bead. The single bead is still very difficult to find and demonstrates the minute nature of a ppm concentration. However, without the distractions of all the other colors, the single bead is much easier to find. Each demo is available separately, however, you can order both bottles as the Set and save.