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1 Ch - Phy Sc M 9A

Physics - Waves & Sounds (Apologia Physical Science M 9A)

QuestionAnswer
mechanical wave a disturbance in matter that transfers energy through the matter
medium the matter through which a wave travels
transverse wave a wave in which the medium vibrates at right angles to the direction the wave travels
trough the lowest point on a wave
crest the highest point on a wave
wavelength the distance between the crests (or troughs) of a wave
amplitude (A) the height of the wave; the maximum displacement of the medium from its rest position
longitudinal wave a wave in which the vibration of the medium is parallel to the direction the wave travels
compressions the places where particles of the medium crowd close together
rarefaction the spaced areas of a wave or where the coils of a medium are pulled farther apart
surface wave a wave that travels along the surface of a medium; a combination of transverse and longitudinal waves
Both transverse and longitudinal waves carry energy through a medium without _______________ ______________. transferring matter
Mechanical waves are formed when a source of energy causes a ____________________ to travel through a medium. vibration
The more energy a wave has, the _______________ its amplitude. greater
If wavelength is INCREASED, frequency is _____________________. decreased
Wavelength and frequency are _________________ proportional to one another. inversely
The more energy a wave has, the greater its __________________. amplitude
frequency the number of complete cycles of waves in a given period of time
hertz (Hz) 1 cycle per second (1/s)
periodic motion any motion that repeats at regular time intervals
period the time it takes to complete one full cycle
wavelength the distance between a point on one cycle of a wave and the same point on the next cycle
Wavelength and frequency are _____________________ proportional to one another. inversely
speed = wavelength x frequency
oscillate to vibrate back and forth
In TRANSVERSE waves, the medium vibrates ________________________ to the direction the wave travels. perpendicular
An example of a transverse wave is shaking a rope up and down.
In LONGITUDINAL waves, the medium vibrates ________________________ to the direction the wave travels. parallel
An example of a longitudinal wave is the compressions and rarefactions of a Slinky.
In surface waves, the medium vibrates both ________________________ and ___________________ to the direction the wave travels, so it has ____________________ __________________. perpendicular parallel circular motion
An example of surface waves are deep water ocean waves.
Created by: MrsHough
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