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