Download CH 8-9 QUIZ

CH 8-9 QUIZ
The lowest parts of a
transverse wave are
called _______.
Troughs
Longitudinal Waves move
the particles of the medium
______ to the direction in
which the waves are
traveling.
parallel
The maximum distance
that the particles of a
medium move from the
rest position is the
__________.
Amplitude
The distance between
two crests of a
transverse wave is the
________.
Wavelength
The bending of waves
due to a change in speed
is called _________.
example:
light through a lens
Refraction
The bending of waves
around the edge of a
barrier is known as
___________.
Diffraction
Waves combine to
make a wave with a
smaller amplitude in a
process called
_______.
Destructive
Interference
Resonance occurs
when vibrations
traveling through an
object match the
object’s natural
___________?
Frequency
Waves produced in the
crust by earthquakes
are called
__________.
Seismic Waves
_______ is a mixture
of sound waves that
sound pleasing.
List the basic
groups of musical
instruments.
Wind
String
Percussion
Sound waves with
frequencies below the
normal human range of
hearing are called
______.
Infrasound
INFRA …. BELOW
Above what dB level can
sound damage the ears?
100 dB
or Greater
Doctors use _________ to
make sonograms.
(Hint: Very High
Frequencies)
Ultrasound
Some bats use _________
to navigate?
“Sound” is not specific
enough.
Echolocation
The most
common type
of hearing
loss is due to
__________.
Aging …. Getting Older.
Why?: Hair Cells in the
Cochlea die.
_______ are the
slower seismic waves
during an earthquake.
Secondary OR S-Waves
Frequency is
measured in units
called ______.
Hertz
OR Hz
The height of a tsunami
is ____ over the open
ocean, and gets _____
when it reaches the
shore.
low or small
and gets….
taller or larger
During a storm, do you first
see lightning
OR
hear thunder ?
See lightning
Light = 300,000,000 m/sec
Sound = 343 m/sec
Sound comes later.
List the 3 variables
that affect the speed
of sound.
Elasticity
Temperature
Density
__________, or
sound level, is
measured in units
called Decibels.
Loudness
The ________ of a
sound that you hear
depends on the sound
wave’s frequency.
Pitch
The changing pitch of
an approaching fire
truck siren is an
example of
___________.
Doppler Effect
How do we change
the pitch of our
own voice?
Tighten or loosen
our vocal chords.
Which part of your
ear collects sound
and directs it towards
the ear drum?
Outer Ear OR Ear Canal
Which part of your ear
converts mechanical
vibrations into signals
for your brain?
Cochlea OR Hair Cells
What concept does the
most common sound
effect on this slide
show demonstrate?
The Doppler Effect
1. Complete pages
313, 319, 328, 335
2. Begin working on
your study guide.