S8P4F

As the fire truck approached Mary, the pitch of the siren got higher. Once the fire truck passed and moved away, the siren's pitch got lower. This change in pitch is because of a change in the sound wave's

• concussion. 
• amplitude. 
• reflection.
• frequency. 

After the train passed, the pitch of the train whistle became lower. This change in sound would be represented by what change in the diagram above? 

• The distance represented by C would increase. 
• The distance represented by C would decrease. 
• The distance represented by D would increase. 
• The distance represented by D would decrease. 

Tags

NGSS.MS-PS4-1

Which of the following would you hear as a low pitched sound? 

• sound wave with a frequency of 50 Hz
• sound wave with frequency of 10,000 Hz
• sound wave with an intensity of 10 dB
• sound wave with an intensity of 100 dB

Tags

NGSS.MS-PS4-1

A tuning fork with a frequency of 404 Hertz is struck with a soft hammer. The fork is struck a second time by the same hammer with twice as much force, and the volume, or amplitude, increases by a factor of two. What will the frequency of the second sound be? 

• 101 Hz
• 202 Hz
• 404 Hz
• 808 Hz

Tags

NGSS.MS-PS4-1

If distance C on the diagram increased, what would happen to the pitch? 

• The pitch would be louder. 
• The pitch would be softer. 
• The pitch would be higher. 
• The pitch would be lower. 

Tags

NGSS.MS-PS4-1

If the distance represented by the letter A were increased, how would it change the way the sound was heard?

• The sound would be higher. 
• The sound would be lower. 
• The sound would be softer. 
• The sound would be louder. 

Tags

NGSS.MS-PS4-1

When comparing the two waves that are shown, how would Wave A (green wave) differ than Wave B (black wave)?

• Wave A and B have the same amplitude, but wave B (black) has a lower pitch.
• Wave A and B have the same amplitude, but Wave A has a lower pitch. 
• Wave A and B have the same pitch, but Wave A is a softer sound. 
• Wave A and B have the same pitch, but Wave B is a softer sound. 

Tags

NGSS.MS-PS4-1