On Wednesday we had a cool science assembly when a scientist came in and talked about changing state and showed us the different states which are solid, liquid and gas. He did different experiments. Some volunteers helped him and at the end of the assembly he did a very dangerous assembly where he put a balloon on top of like a fire extinguisher then the gas filled the balloon and it started to get bigger then all of a sudden there was a very loud bang and the balloon had popped.
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