This activity should use one class period and is recommended for grades 4-12. The Pollution Dilution complements this activity. Pollution Dilution Download Macintosh Version. Download PC Version. This 45 minute math and science activity, appropriate for older students, asks small groups of students to make smaller and smaller concentrations of solutions using food coloring, vanilla or almond extract.
Many pollutants are dangerous at concentrations as low as parts per billion.
Salt Water Download Macintosh Version. Download PC Version. of students are given containers of water with varying salinity, and asked to devise a method for putting the containers in order according to salinity level. Ideally groups will develop a number of different techniques and experiments in attempting to solve this puzzle. This activity is appropriate for secondary level students, and requires at least an hour, preferably two or three, to complete. Bring the Ocean to Your Classroom Download Macintosh Version.