UNIT 2: QUALITIES OF SOUND

Sound is a form of energy produced ....

• ... by the vibration of an object.

• ... by the the pitch.

• ... by the the duration.

• ... by the the timbre.

The air vibrations are called ...

• ... newspapers.

• ... sound trees.

• ... sound waves.

• ... instruments.

Our ______ send a message to our _____ and we hear the sound.

• smart phone/chromebook

• chromebook/smart phone

• brain/ears

• ears/brain

Sound travels at about ____ meters per second through air, but it goes faster through liquids and even faster through solids.

• 340

• 430

• 3400

• 300 000

Sound waves are ___________________, while noise waves are ___________________ .

• regular and tidy/irregular and untidy.

• irregular and untidy/regular and tidy

• noise/silence

• silence/noise

Silence is the absence of ...

• ... music.

• ... sound or noise.

• ... noise.

• ... students. 😉😉😉

Pitch is the characteristic of sound that tells us the difference between ...

• ... a high sound and a low sound.

• ... a long sound and short sound.

• ... a loud sound and a soft sound.

Frequency is a scientific concept that tells us...

• ... the number of vibrations per second of a sound wave.

• ... the number of seconds of a sound.

• ... the decibels of a sound wave.

A scientific term for vibrations per second is ...

• ... second, abbreviated s.

• ... decibel, abbreviated dB.

• ... Hertz, abbreviated Hz.

The sound quality that distinguishes between high sounds from low sounds is called ...

• ... duration.

• ... intensity.

• ... pitch.

• ... timbre