Wave, a disturbance that transfers energy from one place to another, Medium, matter that a wave can transfer thru. Can be a solid, liquid, or gas, Transverse Waves, travel in an up and down motion in which the wave travels perpendicularly from the source to it's destination, Crest, the highest point of a transverse wave, Trough, the lowest point of a transverse wave, Longitudinal Waves, move back and forth. The particles move paralell to the wave, Compression, when the particles are close together in a longitudinal wave, Rarefaction, when particles spread apart, Mechanical Wave, require a medium to travel thru. Examples include sound, and the ocean., Electromagnetic Wave, do not require a medium to travel thru. Disturbances in electric or magnetic fields., Wavelength, the distance between any two crests in a transverse wave., Amplitude, the distance between the crest and the resting position of a wave, Frequency, the number of waves that pass in a given amount of time, Hertz, the unit used to express frequency, Wave Speed, determined by the distance a wave travels in a given amount of time..

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