"Constructed teaching data: these values were invented for this activity, not collected in an experiment." Dataset ID, Conditions,"New record: only H tested in 25°C surroundings. 100 g starts at 38°C; 12 min; other stated procedures match initial record. 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,{} Setup,Water g,Start °C,After 12 min °C "H only, 25°C room",100,38,35