Sound Part 1

It is an unpleasant sound that we hear in our surrounding.

• Music

• Sound

• Noise

• Decibel

What do we call that device that measures the loudness of a sound?

• aircraft

• ear protectors

• stereo

• sound level meter

A very loud and high pitched sound can break a _________.

• wood

• glass

• metal

• plastic

What is the unit of the loudness of a sound?

• Hertz

• Decibel

• Frequency

• Pitch

Who is the scientist that was named after 'decibel'?

• Galileo Galilei

• Alexander Graham Bell

• Albert Einstein

• Isaac Newton

According to the World Health Organization (WHO), what defines a dangerous sound?

• Over 85 decibels

• Below 35 decibels

• Below 40 decibels

• Over 80 decibels

What will happen to you if you listen to noises above 90 decibels for a long time?

• blind

• mute

• deaf

• can't walk

What can we do to avoid noise pollution?

• Turn off the light before we sleep.

• Reduce the volume when listening to music.

• Eat more healthy food.

• Exercise everyday

Which of the following produces more noise?

• People talking

• Dog barking

• rocket taking off

• moving train

What should we wear to protect our ears inside the noisy factory?

• hats

• gloves

• eye glasses

• ear protectors