Later assessment

Later check · A changed setting

A 60 g covered liquid-water sample is placed in a chamber whose room/cup/lid/support stay at 19°C. Covered liquid water; no active heating/cooling, ice, phase change, direct sunlight or meaningful evaporative cooling. Room, cup, lid and supporting surfaces are at the stated surrounding temperature; it stays constant. Readings represent the sample temperature with a consistent procedure. This is a paper scenario, not apparatus instructions.

One chamber record

Constructed teaching data: these values were invented for this activity, not collected in an experiment.

1. Explain the pattern using readings, sample/surroundings and net-transfer direction. State what this table cannot prove.

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This is a paper task. No chamber or water handling is required.

Later check · Idealized equal temperatures

Conceptual case: liquid water, cup/lid/support and room are uniformly and exactly 22°C and remain so. The water is in thermal contact with its surroundings. No active source, phase change, evaporation or other energy input/output. These idealized conditions are stipulated, not inferred from readings.

Given conditions, not an experiment

Constructed teaching data: these values were invented for this activity, not collected in an experiment.

1. Under these idealized conditions, is there net thermal-energy transfer due to a temperature difference? Explain. Does your answer mean particles stop moving?

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2. In another scenario, one water reading is unchanged at 22°C. Does that alone establish thermal equilibrium? Name what else you would need to know.

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