5. a. What do you observe when you push and pull
the other end of the slinky or plastic coil?
b. What do you observe when you push and pull
the other end of the slinky or plastic coil?
c. Do you think the wave in the slinky or plastic
coil carry energy?
Guide Question
6. a. What is formed when you created a
disturbance in one end of the rope?
b. What is the medium used in this activity
through which wave propagates?
c. In which direction did the wave travels
through the rope?
Guide Question
7. The substance that a
wave moves through
periodic disturbance that
moves away from a
source and carries
energy with it.
MEDIUM
WAVE
8. Types of WAVES
LONGITUDINAL
WAVE
TRANSVERSE
WAVE
a wave in which
particles of the medium
move in a direction
PARALLEL to the
direction that the wave
a wave in which particles
of the medium move in a
direction
PERPENDICULAR to
the direction that the
11. Characteristics of WAVES
the lowest point of the
wave
Trough
the distance between
any successive
identical parts of the
wave.
Wavelength
the highest point of
the wave.
Crest
the maximum displacement of
a vibrating particle on either
side of its normal position
when the wave passes
Amplitude
12. a region in a
longitudinal wave
where the particles are
COMPRESSIO
N RAREFACTION
a region in a
longitudinal wave
where the particles are
14. Quiz
1. Which of the following can be
a medium for a wave?
a. Air c. space
b. Water d. all of
these
15. 2. A medium transfers
a. air c. energy
b. matter d. molecules
3. The maximum distance the molecules of a
medium are displaced from their rest position
is the
a. Speed c. amplitude
b. Frequency d. wavelength
Tell something about the pictures.
(Surfer enjoying while riding the waves, strumming a guitar to play music, sunbathing/feel of sun’s rays, sight of waves washing ashore)
Coco is at the side of the swimming pool where a toy boat is floating at a distance not within the reach of coco. The coco wants to move the boat.
Guide Question:
1. How will the boy be able to move the boat?
ANS: One-way to do it is to disturb the water to create waves. The waves will eventually move the boat.
2. Based on what the boy did in the figure above, what is now your idea of a wave?
ANS: A wave is a disturbance propagated through a medium in which energy is transferred.
3. What is the medium of wave propagation in the situation?
ANS: The medium used in which energy is transferred is water, which is liquid in form.
4. How will you prove that waves carry energy in the situation?
ANS: The waves carry energy because the waves move the boat. The energy of a wave is transferred through the vibrating particles of the medium.
SLINKY COIL
Guide Questions:
a. What do you observe when you push and pull the other end of the slinky or plastic coil?
* There are parts in the coil that are compressed and there are parts in the coil that are far apart. This illustrates longitudinal waves.
b. In which direction did the wave travels through the rope?
* The wave travels in the same direction of motion of the slinky coil or plastic coil.
c. Do you think the wave in the slinky or plastic coil carry energy?
* Yes
UP and DOWN
Guide Questions:
a. What is formed when you created a disturbance in one end of the rope?
* A wave is formed when you created a disturbance in one end of the rope.
b. What is the medium used in this activity through which wave propagates?
* The medium used through which the wave propagates is the rope.
c. In which direction did the wave travels through the rope?
* The wave moves up and down through the rope.
d. Do you think the wave in the rope carry energy?
* Yes
Waves occur all around you in the physical world. When you throw a stone into a lake, water waves spread out from the splash. When you strum the strings of a guitar, sound waves carry the noise all around you. When you switch on a lamp, light waves flood the room.
Water, sound, and light waves differ in important ways but they all share the basic properties of wave motion. For instance, you can see water waves and surfers would say that they enjoy riding the waves. On the other hand, you don’t see sound waves and light waves but you experience them in other ways. Your ears can detect sound waves and your skin can get burned by ultraviolet waves if you stay under the sun for too long.
A wave is a periodic disturbance that moves away from a source and carries energy with it. For example, earthquake waves show us that the amount of energy carried by a wave can do work on objects by exerting forces that move objects from their original positions.
The substance that a wave moves through is called the medium. That medium moves back and forth repeatedly, returning to its original position. But the wave travels along the medium. It does not stay in one place.
Crest is the highest point of the wave.
Amplitude is the maximum displacement of a vibrating particle on either side of its normal position when the wave passes.
Wavelength refers to the distance between any successive identical parts of the wave.
Trough is the lowest point of the wave.
A compression is a region in a longitudinal wave where the particles are closest together.
A rarefaction is a region in a longitudinal wave where the particles are furthest apart.
Crest is the highest point of the wave.
Amplitude is the maximum displacement of a vibrating particle on either side of its normal position when the wave passes.
Wavelength refers to the distance between any successive identical parts of the wave.
Trough is the lowest point of the wave.
