Question

A student holds a metal spoon in a candle flame and notes that it takes time before the spoon handle becomes warm. The student draws a diagram of the experiment where red circles represent particles and blue lines represent energy.



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How can the model BEST be revised to show how heat is conducted through metal?



A.
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B.
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C.
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D.
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Answer 1

Answer: B.

Reason: Metals conduct heat mainly by mobile (free) electrons carrying kinetic energy from the hot end to the cooler end, plus some lattice-vibration transfer. The best model therefore shows the metal lattice (atoms) with increased vibration near the flame and small mobile electrons moving and colliding along the rod (with arrows indicating electron motion/energy transfer). That is what option B depicts; the other choices only show energy as static links between atoms or treat energy like a separate particle that doesn't match metallic conduction.