A thermometer is a device used to measure temperature. It consists of a narrow, sealed glass tube with a bulb at one end. The bulb and a portion of the tube are filled with a liquid, typically mercury or colored alcohol, which expands and contracts with temperature changes. The temperature is indicated by the level of the liquid in the tube.
There are several types of thermometers, including:
When the temperature increases, the liquid in the thermometer expands and rises up the tube. Likewise, when the temperature decreases, the liquid contracts and the level in the tube lowers. This change in the level of the liquid is used to determine the temperature.
Here are some key points to remember about thermometers:
By mastering the concept of thermometers, you'll be able to effectively measure and understand temperature, a fundamental aspect of chemistry and many other scientific disciplines.