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What makes those rocks in the party poppers pop? Answered

What makes those rocks in the party poppers pop?

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rickharris (author)2014-11-05

black powder and a friction igniter - somewhat like a match in a fold of sand paper although the sand paper is on the string and the "match" is on the paper tube.

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Kiteman (author)rickharris2014-11-05

Or they may mean what used to be called "space rocks" or "space dust" when I was a kid, the candy that pops and bursts on your tongue.

Like this: https://www.instructables.com/id/Pop-Rocks/

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