"Constructed teaching data: these values were invented for this activity, not collected in an experiment." Dataset ID, Conditions,"100 g, start 10°C, room 22°C, 20 min. Final ≤15.5°C in EVERY trial; ≤8 tokens; ≤20 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." Units,"{""temperature"": ""°C"", ""time"": ""min"", ""mass"": ""g"", ""thickness"": ""mm"", ""resources"": ""fictional tokens, not money or energy""}" Design,Tokens,Added mm,Trial 1 final °C,Trial 2 final °C,Trial 3 final °C A,5,18,15,15.5,15 B,8,20,14,14.5,14 C,9,18,13.5,14,13.5 D,6,24,14.5,15,14.5