Insulation is used to stop heat from traveling. There were 5 materials tested for the ability to insulate: glass, plastic, metal, paper and polystyrene.
A good insulator for keeping things warm is: paper, polystyrene and plastic. The worst is tin and glass.
A good insulator for keeping things cool is: glass, plastic and paper. The worst is polystyrene and tin.
The one best material for keeping things warm and cool is paper.
LI. To learn and practise experience methods.
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