Sound Waves

If you want to change the loudness of a sound, you have to change the ___

• frequency
• amplitude
• speed
• wavelength

If you want to change the pitch of a sound, you have to change the ___

• frequency
• amplitude
• speed
• wavelength

True or False: Sound travels better through solids than through liquids.

• True 
• False

True or False: Sound can travel through a vacuum such as outer space.

• True 
• False

Why is sound able to travel faster through a solid than a gas?

• Gas molecules are packed tightly.
• Sound does not travel faster through a solid than a gas.
• Solid molecules are packed tightly.
• Gas molecules move slowly.

A note is played on a guitar.  Next, a lower note is played on the guitar.  Which of these statements describes the lower note?

• Both notes vibrates at the same frequency.
• The second note vibrates at a lower frequency.
• The second note vibrates at a higher frequency.

Sound waves are what kind of wave?

• Longitudinal
• Transverse
• Surface
• Electromagnetic

A sound wave is produced when an object's molecules _____ .

• Vibrate
• Rotate
• Remains stationary
• Permanently displace

What happens to sound intensity over longer distances?

• Increases
• Decreases
• Stays the same
• Depends on the frequency

What happens to sound frequency over longer distances?

• Increases
• Decreases
• Stays the same
• Depends on the intensity