Name: ________________________
Section: __________
Date: __________
Wave Review
Types of waves:
1. Transverse waves:
•
To do: take a slinky and shake the end up and down
•
Examples: stretched strings of musical instruments and light waves
•
Choose one of the underlined: A transverse wave is a wave in which the
particles of the medium move perpendicular/parallel to the direction of the wave
motion.
•
Looking at the picture describe the following terms:
a. Crests (peak): Top of the wave
b. Troughs: Bottom of the wave
c. Amplitude: Distance from top to
midpoint or from
bottom to midpoint
d. Wavelength: Distance between two
consecutive points
2. Longitudinal Waves:
• To do: stretch or compress the end of a slinky
•
Examples: sound
•
Choose one of the underlined words: A longitudinal wave is a wave in which the
particles of the medium move perpendicular/parallel to the direction of the wave
motion.
•
Looking at the picture describe the following terms:
a. Compression: Parts of the wave where the particles are closer
together
b. Rarefaction: Parts of the wave where the particles are farther
apart
c. Wavelength:Distance between two equivalent points. Distance of
one complete cycle.
A medium or material
3. A mechanical wave is a wave that transfers energy through ___________________.
A medium
A mechanical wave requires a _________________.
A vacuum
4. An electromagnetic wave is a wave that transfers energy through ______________.
medium
An electromagnetic wave does not require a _____________.
Making Waves: For each situation, identify the type of wave (mechanical or
electromagnetic and transverse or longitudinal) and the medium through which the
wave is traveling.
1.
Type of Wave:
Rock
falling
into
water
Ripples in the water.
Mechanical, transverse
Medium:
water
2.
Type of Wave:
Mechanical, longitudinal
Medium:
Sound
Sound produced by the drum.
3.
Type of Wave:
Electromagnetic, transverse
Medium:
A vacuum
Sunlight.
4.
Type of Wave:
Electromagnetic, transverse
Medium:
Microwaves.
5.
In the microwave oven they travel through
air, but they can travel trough a vacuum
Type of Wave:
Mechanical, transverse
Medium:
Crowd
“The wave” at a stadium.
6.
Type of Wave:
Mechanical, circular (both
transverse and longitudinal)
Medium:
Water wave.
water
Determining Frequency: Determine the frequency of each wave
2
7. Frequency = _____________ Hertz
0
1
2
time (s)
1
2
time (s)
1
2
time (s)
1
8. Frequency = _____________
Hertz
0
4
9. Frequency = _____________
Hertz
0
Determining Wavelength: Use a ruler to determine the wavelength of each wave.
10. Wavelength = _____________ cm
11. Wavelength = _____________ cm
12. Wavelength = _____________ cm
Multiple Choice Review
1. Which of the following is the best example of a wave?
A. a stone rolling downhill
B. a vehicle traveling on a bumpy road
C. a string vibrating on a guitar
D. a grasshopper jumping up and down occasionally.
2. The diagram below shows a wave trace.
Distance Z is a measure of
A. amplitude.
B. frequency.
C. wavelength.
D. wave speed.
3. The illustration below shows three toy ducks floating on water, moving up and down as a
wave travels to the right with a velocity of 3 m/s. .
Which of the following is the frequency of the wave?
A. 7.0 Hz
B. 1.33 Hz
C. 1.5 Hz
D. 0.75 Hz
4. The figure below shows a spring with a wave traveling through it.
Which type of wave is illustrated?
A. sound
B. transverse
C. longitudinal
D. electromagnetic
5. What is the frequency of ocean waves that have a speed of 18 m/s and a wavelength of 50 m?
A. 0.18 Hz
B. 0.36 Hz
C. 2.8 Hz
D. 9.0 Hz
6. An organ pipe produces a musical note with a wavelength of 2.72 m. What is the frequency of
this note if the speed of sound is 348 m/s?
A. 85.7 Hz
B. 128 Hz
C. 260 Hz
D. 466 Hz
7. Which of the following best describes the relationship between frequency and wavelength of
electromagnetic waves?
A. If the frequency remains constant, the wavelength increases.
B. The wavelength decreases as the frequency decreases.
C. The frequency increases as the wavelength decreases.
D. If the wavelength remains constant, the frequency increases.
8. Five bowling balls are lined up touching one another on a smooth surface. Striking the first
ball with a hammer makes the fifth ball move away from the group. The force of the hammer
was transmitted through the line of balls as what type of wave?
A. electromagnetic
B. heat
C. longitudinal
D. transverse
9. What causes sound?
A. sunlight
B. vibrations
C. x-rays
D. pitch
10. Sound reaches our ears because sound makes air particles
A. heat up.
B. cool down.
C. slow down.
D. vibrate.
Wave Speed Equation Practice: You MUST show all STEPS.
1. A wave has a frequency of 50 Hz and a wavelength of 10m. What is the speed of the
wave?
(…) v = 500 m/s
2. The speed of a wave is 5m/s. Its wavelength is 2m. What is the frequency of the wave?
(…) f = 2.5 Hz
3. A radio station broadcasts at 90.9 MegaHertz. What is the wavelength of the
electromagnetic waves it broadcasts?
(…) λ = 303 m
OPEN RESPONSE:
BE SURE TO ANSWER AND LABEL ALL PARTS OF THE QUESTION.
Show all your work (diagrams, tables, or computations) in your Student Answer Booklet.
If you do the work in your head, explain in writing how you did the work.
The map below represents the area near the origin of an earthquake.
Earthquakes generate several different kinds of waves. Longitudinal waves are called “P” waves,
and transverse waves are called “S” waves. The “P” waves have a greater velocity than the “S”
waves. An earthquake occurs and these waves travel to point A.
a. Which type of wave is first to reach point A?
b. Describe the expected movement of the ground due to the “P” waves and explain your
reasoning.
c. Describe the expected movement of the ground when the “S” waves reach point A, and
explain your reasoning.
a. “P” waves (longitudinal waves) will be the first type of waves to arrive at
point A. We can see in the picture that there is a lake right in between the
point of origin and point A. Longitudinal waves are the only type of waves
than can travel through a liquid. Transverse waves (“S”) cannot travel
through the lake.
b. The ground will move side to side when a “P” wave passes through. A “P”
wave is a longitudinal wave. Longitudinal waves are waves in which the
medium moves parallel to the motion of the wave.
c. The ground will move up and down when the “S” wave passes through. An
“S” wave is a transverse wave. Transverse waves are waves in which the
medium moves perpendicular to the motion of the wave.