Which instrument is used to measure temperature?

Which instrument is used to measure temperature?

• A. Barometer
• B. Calorimeter
• C. Thermometer
• D. Anemometer

Answer: (C)

Measuring temperature requires a device that translates thermal energy into a readable signal, and that is what a thermometer does. A thermometer uses a material whose physical property changes predictably with temperature—such as liquid expansion in a glass tube or a sensor that changes electrical resistance—providing a numerical readout in units like Celsius, Fahrenheit, or Kelvin. Other instruments have different purposes: a barometer measures atmospheric pressure, a calorimeter assesses heat transfer or energy content of a system, and an anemometer measures wind speed. The thermometer is the instrument designed specifically to quantify temperature.

Measuring temperature requires a device that translates thermal energy into a readable signal, and that is what a thermometer does. A thermometer uses a material whose physical property changes predictably with temperature—such as liquid expansion in a glass tube or a sensor that changes electrical resistance—providing a numerical readout in units like Celsius, Fahrenheit, or Kelvin.

Other instruments have different purposes: a barometer measures atmospheric pressure, a calorimeter assesses heat transfer or energy content of a system, and an anemometer measures wind speed. The thermometer is the instrument designed specifically to quantify temperature.