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Styrofoam is actually a plastic with lots of tiny bubbles trapped inside of it. Because the foam is packed with bubbles, there is relatively little plastic to conduct heat. The bubbles themselves are too small to set up a convection current, and don't conduct very well because they are gaseous. As a result, the Styrofoam works as an insulator, only letting heat transfer through it slowly

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Keely Brakus

Lvl 13
2y ago

What else can I help you with?