How Does a Thermometer Work?

When we're checking thermometers to see what the temperature is outside, inside, or our own body temperature, we rarely think about what makes the thermometer function. This amazing, reliable invention is attributed to Galileo. Readers will learn about the first mercury thermometers and how they work and they'll review the digital models they may be more familiar with today. Many important science concepts are presented along with beneficial photographs and images to support reading comprehension.