Why Rice Krispies go Snap, Crackle, Pop!

When you pour milk into your breakfast bowl, the cereal absorbs the milk. As milk flows into the crispy kernel, the liquid puts pressure on the air inside and pushes it around. The air shoves against each pocketÂ?s walls until they shatter, forcing out a snap, or a crackle, or, as you, know, sometimes a pop. You can also see tiny air bubbles escaping to the surface.

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