```Chapter 17 Waves
Study Guide
Longitudinal
Transverse
Surface Waves
Water Waves
Combo longitudinal and transverse
Refraction
Diffraction
Reflection
Sound takes time to hit walls of a
cave and since the wave can not
pass through it reflects back.
 Why
do you hear echoes?
The material in the egg carton
absorbs the sound waves.
 How
do egg cartons sound proof your
room?
What is wavelength?
What is the amplitude?
What is the difference between
Frequency and Speed?
 Frequency
is the amount of waves that go
by in a given period of time.
 Speed is distance traveled in any amount
of time.
The door prevented the wire from vibrating which
prevented any sound waves from traveling.
 Why
did the homemade phone (with the
two cups and wire) not work when the
door was shut?
d. constructive interference
 What
happens when two waves meet and
create a wave with a taller amplitude?
 a. destructive interference
 c. a date
 b. no one knows
 d. constructive interference
d. All of the above

Which type of mechanical wave needs a
source of energy to produce it?
a.
Transverse wave
Longitudinal wave
Surface wave
All of the above
b.
c.
d.
The wave must enter a new
medium at an angle.
 Describe
how a wave must enter a new
medium in order to refraction to occur.
c. Longitudinal wave

Which wave cause the medium to vibrate
only in a direction parallel to wave’s
motion?
a.
Transverse wave
Surface wave
Longitudinal wave
None of the above
b.
c.
d.
c. Enter a new medium at an angle

For refraction to occur in a wave, the
wave must
a.
Strike an obstacle larger then the
wavelength
Change direction within a medium
Enter a new medium at an angle
b.
c.
d.
Draw a picture of refraction.
Air, water, rope, metal
 List
some of the types of media that can
transport waves.

In an earthquake, a P wave is a
longitudinal wave. It moves through soil
and rock
a.
Wavy line
Not at all
Like an ocean wave
b.
c.
d.
d. None of the above

Amplitude is
a.
How high the wave gets
How wide the wave gets
The pitch of the wave
None of the above
b.
c.
d.
d. reflection

When a wave strikes a solid barrier, it
behaves like a basketball hitting a
backboard. This wave barrier is called
a.
Constructive interference
Diffraction
Refraction
Reflection
b.
c.
d.
longitudinal
 A wave
in a rope is a transverse wave, but
a sound wave is a(n) ___________ wave.
b. Transfer energy through a
medium

Transverse and longitudinal waves both
a.
Have compressions and rarefactions
Transfer energy through a medium
Move at right angles to the vibration of
the medium
Are capable of moving the medium a
long distance.
b.
c.
d.
d. Surface wave

A disturbance sends ripples across water
in a tub. These ripples are an example of
a
a.
Rarefaction
Longitudinal wave
Compression
Surface wave
b.
c.
d.
d. The Doppler effect

An ambulance siren sounds different as it
approaches you than when it moves away
from you. What scientific term would you use
to explain how this happens?
a.
Ultrasound
Diffraction
Rarefaction
The Doppler effect
b.
c.
d.
b. Longitudinal wave

A sound wave is an example of a
a.
Transverse wave
Longitudinal wave
Standing wave
Surface wave
b.
c.
d.
c. The time delay of the returning
echoes

Sonar equipment sends sound waves
into deep water and measures
a.
Refraction of the transmitted wave
Only the direction of the reflected wave
The time delay of the returning echoes
Interference of the transmitted and
reflected waves
b.
c.
d.
energy
 You
can make a wave in a rope by adding
____________ at one end of the rope.
d. All of the above

a.
b.
A mechanical wave moves through a
medium, which can be
Liquid
c. gas
Solid
d. all of the above
perpendicular
 Wave
in a rope are transverse wave
because the medium’s vibration is
__________to the direction in which the
wave travels.
Surface waves
 A pebble
drops straight down into a tub of
water, setting off __________ in the
direction in which the wave travels.
wavelength
 In
a transverse wave, _________is
measured form crest to crest or from
trough to trough.
refraction
 When
white light enters a prism and then
air around it separates into the different
colors. This is an example of
decibel
 The
standard measure used to compare
sound intensities is the
Doppler Effect
 When
a train streaks by blowing its
whistle, the changing pitch you hear is due
to the
Sound waves, like other kinds of waves, reflect, or
bounce back, when they strike a solid barrier. It
takes time for the echo to return, traveling at the
speed of sound, so there is a delay
 In
a large cave, you can hear an echo a
few seconds after you speak. Explain how
this happens in terms of wave properties.
A medium is the material through
which a mechanical wave travels.
 What
is a medium?
The wave will bend or diffract
 Consider
a wave approaching a barrier
with a small hole. What change Is the
wave likely to undergo as it encounters the
barrier?
Shorter, faster vibrations
I
have one short tuning fork and one long
tuning fork. Which one will have a higher
pitch? Why does it have a higher pitch (do
not say because it is shorter or longer!)
A longitudinal wave
 What
type of mechanical wave is
 Give
one example of the Doppler effect?
Hertz, cycles per second, 1/s
 In
what unit is wave frequency measured?
Sonar, imaging
 Give
one example of an ultrasound.
In reflection, a wave hits a solid barrier that it cannot penetrate, so it reflects,
or bounces back, in roughly the same direction from which it came. In
refraction, a wave hits a change in the medium, but instead of reflecting
(bouncing back), it continues on into the new medium, bending as its speed
changes.
 Explain
the difference between reflection
and refraction.
The sun
 What
is the primary source of energy for
Planet Earth?
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