© Erin Kathryn 2017
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Sound Wave Characteristics Internet
Scavenger Hunt
Directions: Click on the link below to answer the following questions.
http://www.ducksters.com/science/physics/sound_wave_characteristics.php
1. A _________________ wave is a special kind of wave that can be
detected by the human ____________. Sound waves have special
characteristics that make them _____________________.
Mechanical Waves
2. One important characteristic of sound waves is that they are
_________________________ waves. This means that they travel
through a _____________________.
3. Normally, we hear sound waves that have traveled through
air, but sound can also travel through _________________,
__________________, the _____________, and many other substances.
Sound cannot travel through a vacuum like _____________
_____________, however.
4. The source of sound waves is something ___________________.
This vibration causes a disturbance in the __________________
around the source. The energy of the wave is ________________
from molecule to molecule within the medium.
© Erin Kathryn 2017
Longitudinal Waves
5. Another ______________________ of sound waves is that they
are longitudinal waves. This means that the disturbance of the
wave travels in the ______________ __________________ as the
wave. As the molecules vibrate and ____________ energy to each
other they cause a wave that moves in the direction of the
vibration.
6. The _________________________ characteristic of sound waves
can be seen the picture below. Here you can see how the
______________________ move in a left to right motion causing the
wave and the disturbance to move in the same _______________.
7. In some areas of the wave the molecules get
__________________ together. This is called _____________________.
In other areas the molecules become spread out. This is called
____________________.
© Erin Kathryn 2017
What is the wavelength of a sound wave?
8. We studied how the wavelength of a ___________________ wave
is measured from crest to crest or trough to trough. This is
fairly easy to see when looking at a graph. However, sound
waves are different as they are __________________________. To
determine the wavelength of a sound wave you measure from
compression to __________________________ or rarefaction to
_______________________.
Pressure Waves
9. Sound waves can also be thought of as _______________ waves.
This is because the _____________________ and ___________________
that move through sound waves have different pressures. The
compressions are areas of ________________ pressure while the
rarefactions are areas of ________________ pressure.
© Erin Kathryn 2017
What is the amplitude of a sound wave?
10. Sometimes you will see a graph of a sound wave that looks
like a ___________________ wave (see below). This is different
from the graph of a ____________________ wave. The peaks and
valleys of this wave graph the changes in _____________________
that occur in the wave. From this graph we can determine the
amplitude of the sound wave. The amplitude is the
________________ of the compression or rarefaction on the graph.
Intensity of a Sound Wave
11. Sound waves are sometimes measured using a quantity
called _____________________. The intensity of a sound wave (I) is
______________________ to the sound power (P) over the area (A):
I = P/A
© Erin Kathryn 2017
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