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Salt and Freshwater Animals Submitted by Ginger
Make a salt water solution and dye it with food coloring. Fill the jar half full of salt solution and then slowly pour plain tap water on top of the solution. The salt water will stay at the bottom of the solution because it is heavier. Release a couple of small brine shrimp (check a pet store) and a goldfish into the solution. The shrimp will go to the seawater bottom while the goldfish will stay at the top (freshwater).