BOBONdHHHHHHYHNԐ  Z-jFLOM!`bxHH@Rg(HH(dh Pl /b.@QH/H/NDb`| NԠ."DSETTIb+ N|NԄNԌNlNذ,X  H I                               ! " # $ % b   H I  R           a   cNpcScientific Method An experiment with elodea, snails and bromthymol blue Materials: Test tube rack, 4 test tubes, bromthymol blue, sprigs of elodea, snails Instructions:1- Fill each test tube half way with bromthymol blue. 2- Add snails to one tube, elodea to one tube, elodea and snails to a third tube, and to tube four add nothing. It should contain only bromthymol blue. Whats your hypothesis? What are your observations? Compare the outcome with your prediction. What do you think happened? Why? How might this experiment be compared to a pond environment? 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