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WorksheetsSound class 8
Total questions: 20
Worksheet time: 12mins
Name
Class
Date
1.
The sound of an object has 120 vibrations per minute. What is the frequency and time period?
a)
60 Hz & 0.167 seconds
b)
3 Hz & 0.33 seconds
c)
5 Hz & 0.2 seconds
d)
2 Hz & 0.5 seconds
2.
Which of the following is the inverse of time period?
a)
Amplitude
b)
Frequency
c)
Pitch
d)
Quality
3.
Sound waves travel the FASTEST through _____________.
a)
gases
b)
liquids
c)
solids
4.
Sound is caused by....
a)
molecules
b)
vibrations
c)
people
d)
space
5.
What is frequency?
a)
the number of vibrations per second
b)
how high or low a sound is
c)
the loudness or softness of a sound
d)
the back and forth movement of matter
6.
Sound does not travel in space because
a)
Space is too far away.
b)
There is no matter in space.
c)
Space is the final frontier
d)
Space has planets.
7.
Speed of light in air is:
a)
5100 m s-1
b)
3*108m s-1
c)
330 m s-1
d)
3*1010 m s-1
8.
Which of the following would you hear as a low pitched sound?
a)
sound wave with a frequency of 50 Hz
b)
sound wave with frequency of 10,000 Hz
c)
sound wave with an intensity of 10 dB
d)
sound wave with an intensity of 100 dB
9.
High pitch sounds are caused by a ______ vibration
a)
fast
b)
slow
c)
hard
d)
soft
10.
If a sound has a high amplitude then it also has a ____________!!!
a)
fast echo
b)
slow pitch
c)
high volume
d)
low volume
11.
Ryan makes an instrument from a drinking straw as shown. If he cuts the straw in half, what will happen to the pitch?
a)
decreases
b)
increases
c)
it will remain the same
d)
there is no sound
12.
Area of a longitudinal wave where particles are CLOSE together.
a)
Compression
b)
Rarefaction
13.
The volume of a sound is measured in units called ________
a)
decibels
b)
liters
c)
sound waves
14.
If you want to change the pitch of a sound, you have to change the ___
a)
frequency
b)
amplitude
c)
speed
d)
volume
15.
When a sound is louder what measurement gets bigger?
a)
Frequency
b)
Amplitude
c)
Wavelength
d)
Crest
16.
What is B?
a)
crest
b)
trough
c)
compression
d)
rarefaction
17.
After the train passed, the pitch of the train whistle became lower. This change in sound would be represented by what change in the diagram above?
a)
The distance represented by C would increase.
b)
The distance represented by C would decrease.
c)
The distance represented by D would increase.
d)
The distance represented by D would decrease.
18.
A student holds two vibrating objects. Object A is vibrating faster than object B. Which statement is true?
a)
A is louder than B
b)
B is louder than A
c)
A will have a higher pitch than B
d)
B will have a higher pitch than A
19.
How is sound produced by these instruments?
a)
Striking the surface
b)
vibrating columns of air
c)
plucking the strings
20.
What will be the frequency, if the string of a guitar is tight?
a)
low
b)
high
c)
no change
d)
none of these
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