SOUND

What is sound according to the video that you seen?

• Moving wind

• A wave or vibration

• flowing water

• stopping air

Through what can sound travel?

• only air

• only liquids

• solids, liquids, and gases

• only solids

What causes sound to travel from one molecule to another?

• mechanical movement

• cold temperature

• light

• vacuum

Why can't sound travel in a vacuum?

• Because the vacuum is too cold

• • Because there are no molecules to vibrate

• Because sound doesn't need vibrations

• Because sound travels faster in a vacuum

What happens when the frequency of sound is high?

• • The sound becomes louder

• • The sound becomes lower

• The sound becomes higher

• The sound disappears

What tool is used to measure the loudness or volume of sound?

• Thermometer

• Decibel

• Ruler

• Hertz

How does frequency affect the pitch of sound?

• High frequency makes the sound lower

• Low frequency makes the sound higher

• Low frequency makes the sound lower

• Frequency does not affect pitch

What is the name of the sound that has a frequency above 20,000 Hz?

• Ultrasound

• Infrasound

• Loud sound

• Silent sound

What is the sound with a frequency below 20 Hz called?

• Ultrasound

• Decibel

• Infrasound

• Mid sound

Sound cannot travel if there are no...

• Air

• Molecules

• Light

• Water