Question

Two pieces of foil being heated by a candle. Warm atoms are red, and cool atoms are blue. The top foil has a small number of warm atoms. The bottom foil has more warm atoms than cool atoms.
Which statements describe how heat flows in foil? Check all that apply.

Heat flows in all directions.
Heat flows from left to right only.
The atoms on top of the foil absorb heat first.
The atoms near the candle absorb heat first.
Heat flows from the cooler atoms to the warmer atoms.
Heat flows from the warmer atoms to the cooler atoms.

Answer 1

Correct choices:
- Heat flows in all directions. — True. Heat is transferred between neighboring atoms in whatever directions the temperature gradients require (not limited to one fixed direction).
- The atoms near the candle absorb heat first. — True. Atoms closest to the heat source gain energy first, then pass it to neighboring atoms.
- Heat flows from the warmer atoms to the cooler atoms. — True. Thermal energy spontaneously moves from higher temperature regions to lower temperature regions.

Incorrect choices:
- Heat flows from left to right only. — False. Heat flow direction depends on temperature differences, not a fixed left→right.
- The atoms on top of the foil absorb heat first. — False (unless the candle is above the foil). The atoms nearest the candle absorb heat first.
- Heat flows from the cooler atoms to the warmer atoms. — False. Heat does not spontaneously flow from cold to hot.