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Unit 3 - Light And Sound Energy
Test Description: Unit 3 - common assessment review
Instructions: Answer all questions to get your test result.
1) A police car's siren changes in frequency as the car travels away. What happens to the sound's frequency?
A
it increases
B
it increases
C
it decreases
D
it does not chage
2) What is the distance between two neighboring wave crests called?
A
frequency
B
wavelength
C
trough
D
amplitude
3) Which wave series would have the lowest frequency?
A
120 waves in 1 minutes
B
60 waves in 60 seconds
C
10 waves in 1 second
D
30 waves in 10 seconds
4) If you increase the amplitude of a sound wave the sound becomes __________.
A
softer
B
lower
C
higher
D
louder
5) The amplitude of a wave refers to how _____ the wave is.
A
long
B
high
C
weak
D
round
6) As an airplane travels across the sky, its sound seems to come from some place behind it. What causes this?
A
The plane is so far away that it takes the sound time to reach the ground.
B
The sound of the plane comes out of the back of the plane.
C
The plane is traveling so fast that it leaves the sound behind.
D
The plane is not really making the sound.
7) A honeybee flaps its wings at 225 flaps per second, a bumblebee flaps its wings at 125 flaps per second, and a mosquito flaps its wings at 600 flaps per second, In terms of pitch which choice aranges them lowest to highest?
A
honeybee, bumblebee, mosquito
B
Bumblebee, mosquito, honeybee
C
bumblebee, honeybee, mosquito
D
mosquito, honeybee, bumblebee
8) Which type of wave is causes by the vibration of matter?
A
microwaves
B
sound waves
C
light
D
infrared waves
9) A transmitter on the moon emits sound and light waves to a reciever on Earth. The light waves are picked up by the receiver but the sound waves are not. This happens because _______________.
A
sound takes a very long time to cover the distance.
B
sound gets scattered before it reaches Earth
C
sound cannot travel through the vacuum
D
the atmoshpere absorbs sound
10) In which medium will sound travel the slowest?
A
glass
B
salt water
C
air
D
water
11) The volume of a sound is determined by the intensity of its vibrations. Which sound has the loudest volume?
A
lawnmorwer (100 db)
B
chain saw (115 db)
C
vacuum cleaner (75 db)
D
noisy restaurant (80 db)
12) How does the speed of light compare to the speed of sound?
A
The speed of light is faster than the speed of sound
B
The speed of light is slower than the speed of sound
C
The speed if sound and the speed of light are equal
D
The speed of sound is faster than the speed of light
13) Unlike sound, light energy can travel through _____________.
A
A vacuum
B
a lead block
C
a piece of cardboard
D
a steel door
14) What happens to the intensity of light as you get farther from the light source?
A
its brightness increases
B
its brightness remains the same
C
it changes color
D
its brightness decreases
*select an answer for all questions
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