Question

A B C D

What happened at point C to end with D?

(4 points)

The surrounding air transferred thermal energy to A and B to equalize both in D. Air is the best conductor of heat.

This scenario can only be possible in a controlled setting in lab.

B transferred thermal energy to A to equalize both in D. Cold always moves toward warmer areas.

A transferred thermal energy to B to equalize both in D. Warmer always moves toward colder areas.
Heat sponataneously flows from a cooler object to a warmer object.(3 points)

True

False
Why does an aluminum block feel colder to the touch than a paperback book when you pick them up even though both objects are at the same temperature?(3 points)

the aluminum block and the paperback book will feel the same.

the aluminum block is a better conductor of heat so it transfers heat away from your skin faster

the paperback book is a better conductor of heat so it transfers heat away from your skin faster
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Answer 1

1) What happened at point C to end with D? (4 points)
- Correct answer: A transferred thermal energy to B to equalize both in D. Heat flows from the warmer object to the cooler one (conduction when they touch), so A cooled and B warmed until they reached the same temperature (thermal equilibrium).
- Why the other choices are incorrect: heat does not spontaneously flow from cold to hot; air can exchange heat but direct contact heat flow between A and B explains the quick equalization; “cold moves toward warmer” is incorrect phrasing.

2) Heat spontaneously flows from a cooler object to a warmer object. (3 points)
- Answer: False.
- Explanation: Spontaneous heat flow is from warmer to cooler objects. Heat flowing from cold to hot requires work/input (e.g., a refrigerator).

3) Why does an aluminum block feel colder than a paperback book at the same temperature? (3 points)
- Correct answer: the aluminum block is a better conductor of heat so it transfers heat away from your skin faster.
- Explanation: Aluminum has a much higher thermal conductivity than paper, so it draws heat from your warm skin more quickly, producing the sensation of greater cold.