Kindergarten and 1st grade students were involved in another fun day of experiments. After investigating the properties of matter and changes that occur in objects, students made hypotheses as to what would happen when a bottle filled with 1/3 vinegar reacted with baking soda spilled into the water bottle from a balloon. The balloon was then draped over the lip of the bottle. Students tested  their hypotheses and reported their results concluding that the baking soda mixed with the vinegar triggering a chemical reaction that produced a carbon dioxide gas that filled the balloon and caused it to expand. Students then wrote in their journals describing and labeling their findings. Students were encouraged to write about a real life connection where they had seen a chemical reaction. Students are learning each week that their hypotheses are not always accurate but that is just a day in the life of a scientist.