Wave - A disturbance that transfers energy, matter - stuff or material, mechanical wave - wave that MUST have material or matter to pass through, medium - matter, or stuff that a wave passes through, sound - waves that can be heard, transmission - the traveling of a wave across a distance, reflection - the bouncing of a wave off a medium, absorption - the transfer of the energy from a wave INTO a medium or material, crest - highest point of a wave, trough - lowest point of a wave, resting position - the starting point of a wave , amplitude - height of a (wave from the middle), length - how long something is, wavelength - how long a wave is from the start of one wave to the end of that wave, frequency - the number of complete waves that pass through a point in 1 second, analog signal - wave that continually changes, digital - a wave that is composed of 1's and 0's, light - electromagnetic radiation (energy), that we can sometimes see, Energy - the ability to do work,

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