ASSESSMENT CARD

Activity 1


Direction: Write TRUE if the statement is correct, write FALSE if the statement is wrong. 


1. Vibration is the source of all sound. 
2. The wavelength is inversely proportional to the frequency. 
3. Sound waves travel through water  in much the same way as air  waves travel through air. 
4. Overtone is the quality that gives the listener the ability to distinguish between the sound of different instruments.
5. The vibrating and resonating parts of musical instruments don't produce sound waves of just one frequency. 


Activity 2

1.                1.       Sound waves are ______

a.   compressional waves

b.   transverse waves

c.   radio waves

d.   molecular waves

       2.    Sound waves cannot travel in outer space because __________ .

a.    they are electromagnetic waves

b.    the gas molecules in outer space air are too far apart

c.    they are mechanical waves

d.     they cannot travel through a medium

3.     How does temperature of a medium affect the speed of sound waves?

a.    As the temperature of a substance decreases, sound waves in it move faster.

b. As the temperature of a substance increases, sound waves in it move more slowly.

c.    Temperature does not affect the speed of sound waves

d.    As the temperature of a substance increases, sound waves in it move  faster.

       3.     In the human ear, sound waves are gathered in the __________.

a.     Inner ear

b.     Cochlea

c.     Outer ear

d.     Middle ear

       4.      What is the difference between music and noise?

a.     It is strictly a matter of opinion

b.     Music has a wider range of frequencies than noise.

c.     Noise has a greater intensity than music.

d.    Music follows a specified pattern of sounds and pitches, noise has no pattern

       5.    __________ is a system that uses the reflection of underwater sound waves to

              detect objects.

a.         Sonar  

b.         Radar

c.         Echolocation

d.        The Doppler Effect

       6.         A spherical sound is produced and spreads outwards from the source. At three

                times the distance from the source the amplitude and intensity of the wave will be...

a.         1/3 and 1/9 as much

b.         both 1/9 as much

c.           both 1/3 as much

d.           3 and 9 times as much

7.       When the frequency of a sound is doubled, the sound produced ….

a.    travels at twice its former speed

b.    has half its former wavelength

c.    has twice its former wavelength

d.    travels at half its former speed

8.       The change in pitch due to a moving wave source is called ____________

a.    the compressional effect

b.    resonance

c.    a rarefaction

d.    the Doppler Effect

8.       The intensity of sound is measured in units called ____________

         

a.    reverberation

b.    decibels

c.    hertz

d.    dopplers

9.       A reflected sound is called a/an ____________

         

a.    doppler

b.     noise

c.    resonance

d.     echo

10.     In which of the following mediums would sound travel the fastest?

a.    Brick

b.    Oil

c.    Water

d.    Air

11.     The human ear is most sensitive to sound with a frequency range of

          a.       3000 to 5000 Hertz

          b.       100 to 500 Hertz

          c.       25000 to 30000 Hertz

          d.       5000 to 15000 Hertz

12.     Units of Hertz are used to measure which property of the wave?

         

a.    Amplitude

b.    Pitch

c.    Wavelength

d.    Frequency

13.     The __________ is the frequency at which a material tends to vibrate when it is disturbed

a.    Natural frequency

b.    Quality

c.    Pitch

d.    Resonance

14.     The echoing effect produced by many reflections of sound is called _________

a.    Resonance

b.    Intensity

c.    Rarefaction

d.    Reverberation

15.     ___________ is the ability of the medium to vibrate by absorbing energy as its natural

          frequency.

a.    Resonance

b.    Overtone

c.    Quality

d.    reverberation