Question

Barometer is used to measure ______.
A. Temperature
B. Rainfall
C. Pressure
D. None of these

Answer 1

Hint:
The word barometer has been derived from the ancient Greek word ‘baros’ which referred to weight.

Complete step by step solution:

Option A ‘temperature’ is measured with the help of an instrument named ‘thermometer’. It can measure food, liquid like water or gas such as air. The units of measurement are Celsius, Fahrenheit and Kelvin. So, it is an incorrect answer.

Option B ‘rainfall’ is measured with the help of ‘precipitation gauges’. It is an open receptacle with vertical sides which is in the form of a right cylinder with a funnel on it. The unit of measurement is mainly in millimeters. Therefore, it is not at all related and an incorrect answer.

Option C ‘pressure’ is measured with the help of a scientific instrument namely ‘barometer’. The atmosphere of the Earth has Layers of air which have weight which is measured by a barometer. The barometer was invented by an Italian Mathematician, Evangelista Torricelli in the year 1643.There are many other types of barometers such as water barometer, aneroid barometer and the mercury barometer through which altitude above sea level can be measured easily.

Hence, the correct answer is option C.

Note:
The most significant advantages of barometer are:
- It has low vapour pressure.
- It possesses high density.
- The evaporation rate is also not very high.
- Most importantly it never sticks to the glass or wets.