Oral: For this method, the thermometer is placed under the tongue. This method is used for adults and children 4 and over who are able to hold thermometer in mouth. Rectal: For this method, the thermometer is inserted gently into the rectum. This is mostly done in babies but can used in children up to 3 years of age.

What is thermometer and its uses?

A thermometer is a device used for measuring temperature. ... A thermometer is an instrument that measures temperature. It can measure the temperature of a solid such as food, a liquid such as water, or a gas such as air. The three most common units of measurement for temperature are Celsius, Fahrenheit, and kelvin.

What are the three uses of thermometer?

- To measure the outdoor temperature. - To measure body temperature during a physical exam at the doctors. - To measure body temperature when someone is ill to determine if he/she has a fever. - To measure the temperature of an oven.