Fathometer is used to measure _____.

1. 1. Ocean depth
   2. Earthquakes
   3. Rainfall
   4. Sound intensity

Altimeter is used to measure _____.

1. 1. the atmospheric pressure
   2. the difference in hearing
   3. the approximate height above the ground
   4. the strength of an electric current

Velocity of wind is measured by _____.

1. 1. Anemometer
   2. Speedometer
   3. Tachometer
   4. Audiometer

Microphone is used to covert _____.

1. 1. sound waves into magnetic current
   2. electrical energy into sound waves
   3. Sound waves into electrical energy
   4. sound waves into light rays

Coronograph is used for _____.

1. 1. studying the arteries
   2. observing and often photographing the sun’s corona
   3. studying the chest
   4. studying the blood in the human body

The instrument which is used to measure relative humidity is called _____.

1. 1. Hygrometer
   2. Hydrometer
   3. Barometer
   4. Mercury Thermometer

Hydrometer is used to measure _____.

1. 1. the acidity of water
   2. the specific gravity of a liquid
   3. the gravity of milk
   4. the pollution in water

Which of the following instruments is used to measure pressure of gases?

1. 1. Split Meter
   2. Manometer
   3. Ammeter
   4. Barometer

Which instrument is used to receive radio waves from objects space?

1. 1. Radio Telescope
   2. Radiograph
   3. Seismograph
   4. Atomic Telescope

The instrument which is used to split light into its spectrum is called _____.

1. 1. Split Meter
   2. Spectroscope
   3. Spectroghraph
   4. Electrometer