Science: Unit 2: Sound Waves

How does pitch relate to frequency?

• lower pitch, lower frequency

• lower pitch, higher frequency

• higher pitch, lower frequency

• higher pitch, higher frequency

Sound Waves are detected by

How does the human body make sound waves?

• air in lungs goes through vocal chords and vibrates

• air in throat goes through vocal chords and vibrates

Can sound travel through a vacuum?

Pitch is
quality of sound based on vibrations

• true

• false

Ultrasound Waves are

• sound waves with frequencies less than 20kHz

• sound waves with frequencies greater than 20kHz

• sound waves with frequencies greater than 25kHz

• sound waves with frequencies greater than 45kHz

What is not true about the Doppler Effect?

• The doppler effect is named after the Austrian scientist Christian Doppler

• an ambulance moving toward a person sounds like the pitch changes from low to high

• pitch changes as the ambulance passes

• an ambulance moving toward a person sounds like the pitch changes from high to low

All objects have a frequency at which they vibrate called

Echolocation is

• the location of objects by reflected sound

• the sound of objects reflected by sound

What is speed of sound?

• system of detecting: water/depth/objects

• distance traveled as wave moves through

• quality of sound based on vibrations

• quality in a sound: deep, full, etc