After learning how matter can change states, we did an experiment where we filled a water bottle with vinegar and a ballon with baking soda. We placed the ballon on top of the bottle and let the baking soda drop in. The vinegar and baking soda produced a gas causing the balloon to become inflated. We also did another experiment where students showed how a liquid can turn into a gas, and back into a liquid through condensation. The students had so much fun learning how matter can change states.