2. Jigsaw Puzzle
Sit beside your group mates. Arrange the jumbled puzzle
pieces until it forms a word. Once done, raise your hand
and present the word that you have formed.
7. is a form of energy produced by vibrating objects.
The basic properties of sound include pitch, loudness, and
timbre (tone).
Sound
8. The highness or lowness of sound is known as the pitch or a
musical note. A higher frequency sound has a higher pitch,
and a lower frequency sound has a lower pitch. The figure
below shows that a high frequency wave has a lot of
vibrations per second, and a low frequency wave has few
vibrations per second.
Pitch
15. The amplitude of a sound wave determines
its loudness or volume. A high amplitude
sound means louder sound, and a low
amplitude sound means softer sound.
Loudness
19. Timbre is a quality of a musical sound which is
used for differentiating two sounds with the same
frequency. Sound waveform is dependent on the
material through which it is produced.
Timbre
20. The following are the characteristics of timbre:
dull, cold, rich, delicate, thick, thin, heavy, clean,
nasal and light.
Timbre
21. Activity 1: Complete Me!
1 . _____is known as the highness or lowness of sound.
2 . Vibrational frequencies beyond 2 0 000 Hz is called _______ frequencies.
3 . Extremely low frequencies are known as _________ frequencies.
4. The amplitude of a sound wave determines its ______ or volume.
5. The unit of intensity level for sound is the __________ which is named after
Alexander Graham Bell.
Directions: Complete the statements by choosing the correct answer from the word box provided.
Write your answers in your Science activity notebook.
22. Activity 2: Complete Me!
What to Do:
1 . Feel the vibration in your throat using your palm while saying your name in 4
different ways: whispering, humming, talking and shouting.
2 . Describe the strength of the vibrations (WEAK, MEDIUM, STRONG) you felt when you
produce the sound.
3 . Copy and complete the table based on your observations.
4. Answer the question below:
How does the vibration change as volume of the sound changes?
Directions: Perform the activity below and write your observations in your 1 /2 crosswise paper.
Observations Modes of Producing the Sound
Whisper Hum Talk Shout
Strength of the
Vibrations
23. Performance Task: Singing
Directions:
Using the same group, choose a song
accompanied by a musical instrument of your
choice (You can improvise any musical instrument
if you don’t have one). Maximum of 3 minutes per
group only.
