What is a Thermometer? Types and Uses

A thermometer is a device used to measure the temperature of an object or substance. It consists of a glass or plastic tube filled with a liquid, such as mercury or alcohol, that expands or contracts in response to changes in temperature. The temperature is then read off from a scale on the side of the tube.
There are different types of thermometers, including:
1. Mercury thermometer: This is the most common type of thermometer. It uses mercury as the measuring liquid and is accurate up to 500°F (260°C).
2. Alcohol thermometer: This type of thermometer uses alcohol as the measuring liquid and is accurate up to 100°F (38°C).
3. Digital thermometer: This type of thermometer uses a digital display to show the temperature reading. It is accurate up to 500°F (260°C) and can be used for both liquids and solids.
4. Infrared thermometer: This type of thermometer uses infrared radiation to measure the temperature of an object or substance. It is accurate up to 1,000°F (538°C).
Thermometers are commonly used in cooking, medicine, science, and industry to measure the temperature of food, drinks, bodies, and materials. They are also used to monitor the temperature of ovens, refrigerators, and other appliances.