When the soda pop is poured into the baby bottle and sealed as quickly as soon as you can, the carbon dioxide gas the soda pop contains begins to be released, inflating the nipple. Then gently rocking the bottle speeds up the process. Cover work area with newspaper. If you cannot find holeless baby bottle nipples apply super glue to the nipple to block the opening. Pass out newspapers, individual student predictors, and activity sheet.
Students mark their hypothesis.
Chart all student predictions on a class graph. Open the can of pop and carefully and quickly fill the baby bottle with soda. Be sure to quickly screw the top on tightly. Gently rock the bottle back and forth. Try making homemade soda by combining varying amounts of baking soda, water, and vinegar.