17 terms

8th Grade Science: Waves - general characteristics

Sound and Light Chapter 1 Section 1-3
STUDY
PLAY
wave
a moving disturbance that transfers energy from place to place
energy
the ability to do work
medium
the material through which a wave travels
mechanical wave
wave that requires matter to move
electromagnetic wave
wave that travels by disturbing electric and magnetic fields
vibration
a repeated back-and-forth or up-and-down motion
transverse wave
a wave that vibrates the medium at right angles, or perpendicular, to the direction in which the wave travels
longitudinal wave
a wave that vibrates the medium in the same direction in which the wave travels
crest
a high point on a transverse wave
trough
a low point on a transverse wave
compression
an area in a longitudinal wave where matter is more dense
rarefaction
an area in a longitudinal wave where matter is less dense
amplitude
the maximum distance the medium vibrates from the rest position (the wave's energy)
wavelength
the distance between two corresponding parts of a wave (such as between two crests)
frequency
the number of waves that pass a given point in a certain amount of time (measured as a ratio, such as waves per second)
hertz (Hz)
the unit in which frequency is measured; waves per second
speed
The rate at which a wave moves through a given medium