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Physical Science ch 15
Waves
32
Science
9th Grade
11/14/2011

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Term
compressions
Definition
-the squeezed together parts of a longitudinal wave
Term
increases
Definition
-when a light wave moves from a more dense medium into a less dense medium, its speed ___________________.
Term
light
Definition
-the kind of wave that does not require a medium
Term
rarefactions
Definition
-the spread out parts of a longitudinal wave
Term
refraction
Definition
-the bending of waves
Term
energy
Definition
-waves transfer ____________________
Term
wavelength
Definition
-the distance between the crests of two neighboring waves
Term
amplitude
Definition
-the maximun displacement of a particles of a wave
Term
vibrations
Definition
-waves are often caused by _______________ (ex. vocal cords causing sound waves)
Term
medium
Definition
-the speed of a wave depends on the ________________ in which it travels
Term
trough
Definition
-the lowest point of a transverse wave
Term
amplitude
Definition
-another name for the height of a wave
Term
frequencies
Definition
-our eyes can detect light only within a range of ______________________ called visible light
Term
period
Definition
-the time it takes for one full vibration of a particle in a medium
Term
wave
Definition
- a disturbance that carries energy through space
Term
mechanical waves
Definition
-waves that require a medium are called ___________________ waves
Term
electromagnetic waves
Definition
-waves that do not require a medium
Term
wave fronts
Definition
-when a stone falls in a pond, the waves spread out in circles called ______________ ___________________
Term
transverse waves
Definition
-waves in which the particles move in a motion perpendicular to the motion of the wave
Term
longitudinal waves
Definition
-waves that cause the particles of the wave to vibrate parallel to the direction of the wave motion
Term
period
Definition
-the time it takes for one full vibration of a particle in a medium
Term
frequency
Definition
-this is the inverse of period
Term
air
Definition
-sound saves from a radio travel in this medium
Term
earth
Definition
-seismic waves travel in this medium
Term
frequency
Definition
-the Doppler effect is an observed change in a wave's ______________________
Term
longitudinal
Definition
-sound waves are (transverse) or (longitudinal)?
Term
2 hertz
Definition
-a wave has a period of 0.5 seconds; the frequency of this wave is __________________
Term
pitch
Definition
-the frequency of a sound wave determines the ____________________ of the sound
Term
frequency
Definition
-the differences in color in visible light, such as those in a rainbow, are caused by differences in ________________
Term
transverse
Definition
-light waves are (transverse) or (longitudinal)?
Term
electromagnetic
Definition
-these waves do NOT require a medium
Term
amplitude
Definition
-how loud a sound is depends on the __________________ of the waves
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