Independent challenge: proposal first

Independent challenge · Record a proposal first

Finish and retain your proposal before reading the separate redesign evidence.

80 g, start 11°C, room 23°C, 16 min. Final ≤16.5°C in EVERY trial; ≤5 tokens; ≤19 mm added thickness. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.

Supplied design record

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

Design

Tokens

Added mm

Trial 1 final °C

Trial 2 final °C

Trial 3 final °C

J

3

14

16

16

16.5

K

5

19

15

15.5

15

L

4

16

15

17

15

N

6

18

14

14.5

14

1. Check every requirement. Which designs are feasible? Select one and justify your priority with relevant comparisons across trials.

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2. Propose a specific modification to your chosen design. State a testable prediction and describe a matched repeated comparison against the unchanged design. Include starting conditions, duration, what to record, and what would count against the prediction.

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