How is sound produced?

• By the vibration of particles

• By the transfer of particles

The reflection of sound waves off a hard surface can create

• An echo

• A sound wave

Which of the reading has the highest sound level.

• 40dB

• 70dB

• 120dB

A guitar is struck and starts to vibrate. What will happen next?

• The guitar will make light.

• The guitar will make sound.

• The guitar will become heavier.

What are unwanted sounds called?

• Song

• Music

• Noise

• Alarm

The class next door is making a lot of noise. What can we do to keep the noise out?

• Build a thicker wall

• Scold the children

• Hang curtains

Which of the following function as sound absorber?

• Carpet

• Tables

• Chairs

• Handkerchief

Which of the following produce low pitch sound?

• bird chirping

• baby squealing

• cow mooing

• kettle whistling

Which of the following can produce sound with a different pitch?

• Piano

• Shaker

• Tambourine

• Bass drum

Which tool is used to measure sound level?

• Lever balance

• Sound-level meter

• Measuring tape

• Stopwatch