Which material is a poor conductor of heat?

Which material is a poor conductor of heat?

• A. Metal
• B. Copper
• C. Plastic
• D. Aluminum

Answer: (C)

Heat moves through materials mainly by conduction, and how easily energy flows depends on the material’s structure. Metals have many free electrons that move rapidly and transfer energy quickly, so they conduct heat well. Copper and aluminum are common examples of this, which is why pots, pans, and cookware often use metal. Plastic, on the other hand, is a poor conductor because its molecules don’t have free electrons to carry heat; energy transfer happens mainly through slower molecular interactions, so heat moves through plastic much more slowly. This makes plastic a good insulating material, like plastic handles or insulating liners. So, plastic is the material that resists heat flow the most, making it the correct choice.

Heat moves through materials mainly by conduction, and how easily energy flows depends on the material’s structure. Metals have many free electrons that move rapidly and transfer energy quickly, so they conduct heat well. Copper and aluminum are common examples of this, which is why pots, pans, and cookware often use metal. Plastic, on the other hand, is a poor conductor because its molecules don’t have free electrons to carry heat; energy transfer happens mainly through slower molecular interactions, so heat moves through plastic much more slowly. This makes plastic a good insulating material, like plastic handles or insulating liners. So, plastic is the material that resists heat flow the most, making it the correct choice.