Sound

How is sound made?

• By moving air molecules

• By light waves

• By water waves

• By bouncing light off an object

What part of the body helps us hear sound?

• Nose

• Eyes

• Ears

• Mouth

What do we call the number of vibrations per second that makes a sound higher or lower?

• Pitch

• Volume

• Frequency

• Speed

What happens when the frequency of a sound increases?

• The sound gets louder

• The sound gets softer

• The sound gets higher in pitch

• The sound gets lower in pitch

What happens when the frequency of a sound decreases?

• The pitch of the sound becomes higher.

• The pitch of the sound becomes lower.

• The sound becomes louder.

• The sound becomes softer.

What do we measure the volume of sound in?

• Decibels

• Hertz

• Meters

• Kilograms

If a sound is very loud, what is its volume in decibels?

• 10 decibels

• 50 decibels

• 100 decibels

• 200 decibels

Which of the following produces a soft sound?

• Whispering

• Shouting

• A drum

• A fire truck siren

What do we call materials that block or reduce sound?

• Conductors

• Insulators

What is the best material to use to insulate sound?

• Metal

• Wood

• Foam

• Glass