Figure 1. Cut off the tops of the milk cartons, leaving about 6 inches remaining; use the nail to poke a hole in ONE CORNER of the carton bottom from the inside. Fill the cartons to a depth of one inch with the materials to be tested; one type per carton. Place each carton on top of a 400 ml beaker with the drain hole down. See Figure 1 on the student sheet. Mark the catch beakers up one inch from the bottom with the grease pencil and slowly add 250 ml of water to each carton.

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Last updated on October 6, 2005

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