When the thermometer is cooled, the molecules move more slowly, get closer together, and move down in the tube. When the thermometer is heated, the molecules move faster, get slightly further apart, ...

Have you ever placed a thermometer under your tongue and wondered how that tiny device knows if you have a fever? Or checked the weather and thought about how scientists measure temperature so ...

requiring two to three seconds for a reading and boasting a 1-degree Fahrenheit accuracy rather than half a degree, but those are still great numbers for a thermometer at its price point.

Accuracy is each model's performance compared to that of a medical grade thermometer. Readings were taken on adults without fever. Two buttons for basic operation. Has memory recall, with up to 10 ...