Which statement describes an insulator's effect on heat transfer?

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Multiple Choice

Which statement describes an insulator's effect on heat transfer?

The main idea is that insulators slow down heat flow. An insulating material has low thermal conductivity, so it resists the movement of heat from a warmer area to a cooler one. This is why a wrapped bottle, a winter coat, or a cavity wall helps keep heat in or out—the material traps air and provides fewer pathways for heat to travel by conduction, convection, or radiation. The other statements aren’t about heat transfer. Insulators are poor conductors of electricity, not better ones, so saying they conduct electricity better doesn’t fit heat transfer. Mass isn’t what determines insulation effectiveness, so having zero mass isn’t relevant. And insulators don’t generally become heat conductors just because they’re heated; they remain poor conductors of heat, even if their properties can change slightly with temperature.

The main idea is that insulators slow down heat flow. An insulating material has low thermal conductivity, so it resists the movement of heat from a warmer area to a cooler one. This is why a wrapped bottle, a winter coat, or a cavity wall helps keep heat in or out—the material traps air and provides fewer pathways for heat to travel by conduction, convection, or radiation.

The other statements aren’t about heat transfer. Insulators are poor conductors of electricity, not better ones, so saying they conduct electricity better doesn’t fit heat transfer. Mass isn’t what determines insulation effectiveness, so having zero mass isn’t relevant. And insulators don’t generally become heat conductors just because they’re heated; they remain poor conductors of heat, even if their properties can change slightly with temperature.

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