Insulator are used to stop heat from moving place to place.Fire materials were tested for the ability to insulate : glass, plastic, metal, paper, and polystyrene.
The best insulators for keeping the best thing warm is tin cups and plastic cup.
The best insulators for keeping thing cool is paper cups, plastic cups, and glass cup.
The best insulation for cold and warm is paper cups.
LI: to determine the insulative properties of materials.
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