Insulation reduces heat transfer in a house. Which material is commonly used as insulation?

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Multiple Choice

Insulation reduces heat transfer in a house. Which material is commonly used as insulation?

Insulation works by reducing heat transfer, mainly through low thermal conductivity and by trapping air. Polystyrene foam has lots of tiny air pockets, which greatly slows heat flow by conduction. That makes it a very effective insulating material for walls and roofs. Copper piping and aluminum foil are good conductors or reflectors of heat, not bulk insulators, so they aren’t used to insulate spaces. Glass in solid form conducts heat more than foam, though glass fibers (fibreglass) are used in some insulation, the option given isn’t the common insulation form. So polystyrene foam is the best choice.

Insulation works by reducing heat transfer, mainly through low thermal conductivity and by trapping air. Polystyrene foam has lots of tiny air pockets, which greatly slows heat flow by conduction. That makes it a very effective insulating material for walls and roofs. Copper piping and aluminum foil are good conductors or reflectors of heat, not bulk insulators, so they aren’t used to insulate spaces. Glass in solid form conducts heat more than foam, though glass fibers (fibreglass) are used in some insulation, the option given isn’t the common insulation form. So polystyrene foam is the best choice.

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