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Ch 9, 8th Grade
Test Description: Waves
Instructions: Answer all questions to get your test result.
1) A disturbance involving the transfer of energy from place to place
A
energy
B
medium
C
wave
D
interference
2) Which of the following can be a medium for waves?
A
all of the above
B
gases
C
liquids
D
solids
3) Waves that require a medium to travel are called
A
light waves
B
electromagnetic waves
C
mechanical waves
D
magnetic waves
4) A low point of a wave is called a
A
amplitude
B
crest
C
trough
D
compression
5) A ___ is an area where particles are close together on a longitudinal wave
A
compression
B
rarefaction
C
crest
D
trough
6) Surface waves travel along a surface that
A
separates two mediums
B
is made of solids
C
is very dense
D
is very deep
7) Surface waves
A
vibrate up and down
B
both
C
move back and forth slightly
8) The distance between two crests is a wave's
A
amplitude
B
wavelength
C
frequency
D
speed
9) The bending of a wave due to a change in speed is called
A
diffraction
B
refraction
C
interference
D
reflection
10) Two waves are traveling towards each other. The crests of the waves meet. What happens?
A
diffraction
B
refraction
C
constructive interference
D
destructive interference
11) What is the angle of reflection if a wave enters a mirror at an angle of 65 degrees?
A
90 degrees
B
115 degrees
C
25 degrees
D
65 degrees
12) The more energy a wave has, the greater its
A
rest position
B
wavelength
C
all of the above
D
amplitude
13) The wavelength of a longitudinal wave can be measured by measuring the distance between
A
none of the above
B
crests
C
troughs
D
compressions
14) If two waves pass every second, the frequency of the wave is
A
20 Hz
B
2 seconds
C
2 Hz
D
2 m/s
15) Light waves travel slower than sound waves.
A
false
B
true
16) The line perpendicular to the surface at the point where reflection occurs
A
normal
B
node
C
resting point
D
antinode
17) Light travels in a straight line except when
A
it enters a new medium straight on
B
it never travels in a straight line
C
it enters a new medium at an angle
18) A wave moving around a barrier and bending is an example of
A
refraction
B
infraction
C
diffusion
D
diffraction
19) If two troughs overlap, they make a
A
smaller trough
B
deeper trough
C
smaller crest
D
no trough
20) If a crest and a trough have equal amplitudes and combine, they will
A
always make a crest
B
completely cancel
C
make a crest with a small trough
D
make a trough with a small crest
*select an answer for all questions
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