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wave

a disturbance that transfers energy from one place to another without transferrring matter

medium

materials in which a wave travels

transverse wave

a wave in which the disturbance is perpendicular to the direction the wave travels

crest

highest point on a transverse wave

trough

lowest point on a transverse wave

longitudinal wave

makes the particles in a medium move parallel to the direction that the wave travels

compresssion

region of a longitudinal wave where particles in the medium are closest together

rarefaction

region of a longitudinal wave where the particles are farthest apart

electromagnetic waves

a wave that can travel through empty space

mechanical wave

a wave that can travel only through matter

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