Question

Anemometer is a ______________ instrument.
     A) Light
     B) weather station
     C) sound producing
     D) reflecting

Answer 1

Hint: The Greek word ‘anemos’ means wind. The name anemometer has been derived from this word since it is an instrument that has the ability to measure the direction and the speed of wind. There are many different types of anemometers.

Complete answer:
Anemometers are devices that are used for measuring the direction and speed of winds. Due to this ability to measure the direction and speed of winds, the anemometer also finds its use in predicting weather conditions based upon changes in wind speed and direction. Hence, anemometers are also used as weather station instruments.
For example, if the wind speed increases suddenly, it may be an indication that a thunderstorm is approaching.

Therefore, the correct option is B) weather station.

Additional information:
There are many different types of anemometer that have been classified according to their basis of construction such as cup anemometers, vane anemometer, hot wire anemometers, laser Doppler anemometers, ultrasonic anemometers, acoustic resonance anemometers, ping pong ball anemometers, plate anemometers and tube anemometers.

Note:
Students can get a feel for the working of anemometers by constructing a very simple anemometer themselves. This can be done by using 4 plastic cups and arranging them similar to the plates or cups that are present in an actual anemometer with the help of pencils and tying them together using strings. Then, this miniature anemometer will work similar to a real anemometer and rotate when a wind blows in its direction. The rate of rotation of the cups in a circle is directly proportional to the speed of wind.