When you combined the solid (baking soda) and the liquid (vinegar), the chemical reaction created a gas called carbon dioxide. Carbon dioxide is invisible, except as the bubbles of gas you may have noticed when the vinegar and baking soda mixture began to fizz. This gas is what made the balloon inflate.
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- holiday hours (through Nov. 29)
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Wondrous Cold
Explore the stark and amazing landscape of Antarctica in this photographic tour.