Sound Class 8

What is the definition of Sound??

• Sound is a form of light energy.
• Sound is a form of matter.
• Sound is a form of electromagnetic radiation.
• Sound is a form of energy that is transmitted through vibrations or waves in a medium such as air, water, or solids.

Answer explanation

Sound is basically sound waves travelling in the form of vibrations.

What do we mean by hertz??

• Hertz is a unit of voltage.
• Hertz is a unit of speed.
• Hertz is a unit of time.
• Hertz is a unit of frequency.

What is the full form of SONAR??

• Sound Navigation and Ranging
• Sound Oriented Navigation and Ranging
• Sound Observation and Ranging
• Sound Noticle and Orientation

In Sound, What is the unit for measuring time period?? ( small letters only )

What is the range of a sonic sound in hertz??

• 20 Hz - 20,000 Hz
• 10 Hz - 10,000 Hz
• 100 Hz - 100,000 Hz
• 50 Hz - 50,000 Hz

What is a galton whistle??

• A galton whistle is a type of musical instrument.
• A galton whistle is a type of bird call.
• A galton whistle is a type of measuring tool used in construction.
• A galton whistle is a type of whistle invented by Sir Francis Galton.

What makes a sound a music??

• The absence of any musical elements in a composition.
• An Unpleasant sound containing irregular patterns.

• The random combination of sounds without any structure or meaning.
• A pleasant sound containing repeating patterns that calm down the human brain cells.

Diffrentiate between music and noise.

• Music is pleasant to listen to, while noise is unpleasant.
• Music is created by humans, while noise is natural.
• Noise is useful, while Music disturbs the human ear.

• Music is random and chaotic, while noise is organized and structured.

In Which Medium, sound propogates the maximum? ( small letters only )

What is the SI Unit of amplitude?

• meters (m)
• liters (L)
• seconds (s)
• kilograms (kg)