Yesterday we went to Room 20. We did an experiment called expanding bags. We needed vinegar, baking soda, a plastic bag and a tissue. I thought it would go all bubbly and would puff up and pop!! We put the baking soda in a tissue. Then we dropped it in the vinegar. It made a gas called carbon dioxide. The bag puffed up and went pop!! It popped because the vinegar made a gas called carbon dioxide. by Kaleb Demanser
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