Sound | Year 4 (DLP) | Bunyi

What is sound?

• A form of light produced by a vibrating object.

• A form of energy produced by a vibrating object.

• A type of matter produced by a vibrating object.

• A form of heat produced by a vibrating object.

How is sound produced when playing a guitar?

• By blowing air into the guitar.

• By knocking on the guitar's body.

• By plucking the strings, causing them to vibrate.

• By shaking the guitar.

What part of the body vibrates to produce sound when we speak?

• Our ears

• Our tongue

• Our voice box

• Our teeth

Which phenomenon of sound reflection is used by bats, dolphins, and whales to navigate and find prey?

• Echo

• Ultrasound

• Sonar

• Reverberation

What is a potential harmful effect of sound pollution?

• Improved communication

• Increased relaxation

• Hearing problems

• Enhanced concentration

What are the way to protect the ground worker ears at the airport exposure to aircraft sound?

• Use regular headphones
• Increase the volume of aircraft sounds
• Ignore noise regulations
• Use earplugs or earmuffs