A thermometer is a tool that measures temperature — how hot or cold something is. Thermometers are used to see if you have a fever or tell you how cold it is outside. Made up of thermo (heat) and meter (measuring device), the meaning of the word thermometer is pretty straightforward.
In this way, what are the 4 types of thermometers?
There are different types, but not all thermometers are right for your child.
- Digital thermometers. …
- Ear (or tympanic) thermometers. …
- Infared thermometers. …
- Strip-type thermometers. …
- Mercury thermometers.
Besides, what are types of thermometer?
Digital thermometers are the most accurate way to take body temperature. There are many types, including oral, rectal, and forehead, plus many that are multifunctional. Once you decide on the type of thermometer you want, you can think about design, extra features, and price.
What is a thermometer Class 7?
Thermometer is a device which is used to measure temperature. Thermometer is made of a long narrow glass tube, with a bulb at one end. The narrow tube appears as a continuous silver line, because it is filled with mercury.
What is clinical thermometer in physics?
A clinical or medical thermometer is a thermometer used to measure human body temperature. … Most show both Celsius scale and Fahrenheit temperature scales, and run from 35 degree Celsius to 42 degree Celsius.
What is SI unit of temperature?
The kelvin is the SI unit of thermodynamic temperature, and one of the seven SI base units. … Unusually in the SI, we also define another unit of temperature, called the degree Celsius (°C).
What is the importance of a thermometer?
Thermometers are used to measure the temperature and this is a very important part of weather forecasting. Many thermometers come in a glass tube that contains a liquid, usually mercury or alcohol. The liquid expands when it’s hotter and contracts when it is colder.
What is the principle of thermometer?
These liquid thermometers are based on the principal of thermal expansion. When a substance gets hotter, it expands to a greater volume. Nearly all substances exhibit this behavior of thermal expansion. It is the basis of the design and operation of thermometers.
What is thermometer and its types?
A thermometer is a device that is used to measure the temperature of a body. Common types of thermometers are Medical thermometers, Infrared thermometers, Mercury thermometers, thermocouple thermometers, laboratory thermometers, Bimetallic strip thermometers, Pyrometers, etc.
What temperature is a fever?
The following thermometer readings generally indicate a fever: Rectal, ear or temporal artery temperature of 100.4 (38 C) or higher. Oral temperature of 100 F (37.8 C) or higher. Armpit temperature of 99 F (37.2 C) or higher.
Whats is the meaning of thermometer?
Why is it called thermometer?
The term is a compound word consisting of a Greek root and a French suffix, also of Greek origin. The ancient Greek word θέρμη, or therme, means heat, and θερμός (thermos) means hot, glowing, or boiling. … After “the van Etten” book came out, the word thermometer began cropping up in other scientific treatises.
Why mercury is used in thermometer?
Mercury is the only one in liquid state at room temperature. It’s used in thermometers because it has high coefficient of expansion. … It also has a high boiling point which makes it very suitable to measure higher temperatures. Also, it has a shiny appearance and doesn’t stick to the glass surface of glass.