The document provides an overview of waves, detailing how they are produced, their ability to carry energy, and the behavior of particles within a medium during wave propagation. It explains the different types of waves—transverse, longitudinal, and surface—along with key concepts such as wavelength, frequency, amplitude, and the speed of sound in various media. Important relationships between frequency, wavelength, and period are also discussed, highlighting how sound waves travel faster in solids compared to gases.

2. WAVES -CARRIERS
OF ENERGY

3. 1. Object at rest 3. Object speeds up
2. Constant velocity 4. Object slowing down D
B
C
A
RECALL:

4. PART B:

5. PART B:
VELOCITY
TIME
VELOCITY
TIME

6. OBJECTIVES:
1. Describe how waves are produced.
2. Demonstrate understanding of waves as a
carrier of energy.
3. Describe what happens to the particles of
a medium as waves are propagated through
the medium;

7. 4. Explain how wave motion transfers energy;
5. Identify and describe the different parts of a wave
6. Describe how sound waves are produced and
propagated;
7. Compare the speed of sound waves in different
media and
8. Solve problems involving relations between
speed, wavelength and frequency of
sound waves

8. MOTIVATION:
Describe the hand
wave. What did you
observe?

9. UNLOCKING OF WORD
DIFFICULTIES:
MEDIUM
- acts as a
carrier
DISTURBANCE
-cause of
change of
the current
state
VIBRATE
- move
continuously
and rapidly
to and from
WAVE
- a
disturbance
that travels
through a
medium
VIBRATE WAVE DISTURBANCE MEDIUM

10. ACTIVITY 1: Let's Make Waves-
TRANSVERSE WAVE

11. ACTIVITY PROPER:
1. What is the source of the wave pulse?
A vibration due to the a quick shake at one end of the
rope
2. Describe the motion of your hand as you create the
pulse.
Up and down motion

12. ACTIVITY PROPER:
3. Describe the motion of the pulse with respect to the
source.
The pulse moved away from the source
4. Does the wave transfer the green colored bead from
its original position to the end of the rope?
No

13. ACTIVITY:
5. Describe the motion of a transverse wave. How does it
move?
Transverse waves are waves in which each particle
moves perpendicular to the direction of the wave motion (
up & down)
Transverse wave

14. ACTIVITY 2:Let's Make Waves- LONGITUDINAL WAVES
1. Describe your observation.
BACK & FORTH
2. How do you call the stretched and compressed region?
Rarefaction ( STRETCHED)
Compression ( COMPRESSION)
Longitudinal waves

15. In a longitudinal waves there are two factor
that are involve which is ;
Compression Rarefaction
Is a region in longitudinal
wave where the particles
are closest together
It is a region in a
longitudinal wave where
the particles are furthest
apart

16. Procedure
A.
Label the diagram as indicated
2. Complete the tabulation based
from the given ideas

17. Parts of a wave
Crest
Wavelength
Amplitude
Trough
Line of
origin

18. 5
2
1
3
4

19. Characteristic of a waves
1. Wavelength of a wave can be described as the distance
between 2 consecutive crests or troughs . The shape of a the
wave forms a sine curve and describes simple harmonic
motion. (SI unit meters)

20. 2. Period is the time required for one complete
wave to pass a particular point. (SI unit: per
seconds)It is also the reciprocal of frequency.

21. 3. Frequency is the number of cycles
per unit time. (SI unit: per seconds or
Hz)

22. Relationship of Frequency and Wavelength
Frequency and wavelength are inversely proportional to one
another.
• The higher the frequency, the shorter the wavelength
• The shorter the frequency, the higher the wavelength

23. Relationship of Frequency and Period
Frequency and period are inversely proportional to one another.
• The higher the frequency, the shorter the period
• The shorter the frequency, the higher the period

24. 4. Amplitude is the maximum displacement from
the equilibrium position. (SI unit: meters)

25. 5. Wave speed is the distance traveled by the wave
per unit time. (meter/sec or m/s) It depends on the
medium through which the wave is travelling

26. v = wave speed
= wavelength
f = frequency

27. v m/s
m
f /s

28. ACTIVITY 3:Let's Make Waves- SURFACE
WAVE

29. ACTIVITY PROPER:
1. Describe the water waves as you seem from the top of
the basin.
VIBRATES
2. How do you describe the movement of waves.
It’s start from the center going to side

30. Sound Waves

31. Motivation: Observe what you see and hear,
which comes first the light of the fireworks or
the sound of it.

32. Motivation: During a bad day, have you notice a
loud sound and flashing lights in the clouds?

33. Arrangement of each particle in a medium
• Sounds travel more quickly in solid particles because the
particles in it are closely pack to each other.
• Sounds travel slowest in gas particles because its particles
are far apart from one another.

34. Procedure:
Analyze the table showing the speed of sound in different materials
2. The speed of sound wave depends on the characteristics of the materials through which it travels and temperature of the medium.
Analyze the table showing the speed of
sound in different materials
1. The speed of sound wave depends on the
characteristics of the materials through which
it travels and temperature of the medium.

35. Speed of Sound Waves at 0°C

36. Critical Thinking:
1. In what medium do sound waves travel the fastest? Why?
Solid (aluminum), because particles of solid are
more closely packed than liquid and gas
2. In what medium do sound waves travel the slowest? And
Why?
Gas (Air), because there are big spaces between
molecules of gas.

37. 3. Why do sound waves do not travel in a vacuum?
Sound cannot travel through a vacuum because
sound is a mechanical wave which needs medium to
propagate.
4. Based from the table what is the wavelength of sound
waves with a frequency of 510Hz (510 cycles/s) while
travelling in water?
2.86m/s

38. 5. What is the frequency of sound waves
with a wavelength of 60m traveling in
air at a speed of 380 m/s?
6.33 /s

39. REMEMBER:
 There are two kinds of waves:
Electromagnetic waves and Mechanical
waves. Electromagnetic waves do not
require any medium of propagation (it
can travel through a vacuum).
Mechanical waves require a medium for
propagation (like solid, liquid or gas).

40. KEY POINTS TO REMEMBER:
1
a. A wave is a disturbance in a
medium that moves from one
place to another.

41. KEY POINTS TO REMEMBER:
2
b. A wave transfer energy without
transferring matter.

42. KEY POINTS TO REMEMBER:
3
c. There are two kinds of waves: Electromagnetic
waves and Mechanical waves. Electromagnetic waves
do not require any medium of propagation (it can
travel through a vacuum). Mechanical waves require a
medium for propagation (like solid, liquid or gas).

43. KEY POINTS TO REMEMBER:
4
d. Mechanical waves may be
transverse, longitudinal or surface
waves.

44. KEY POINTS TO REMEMBER:
5
e. Transverse waves are waves in which each particle
moves perpendicular to the direction of the wave motion
while longitudinal waves are waves in which the particles
of the medium move parallel to the propagation of the
wave motion. Surface waves have characteristics of both
transverse and longitudinal waves.

45. Stay safe!