(Print) Use this randomly generated list as your call list when playing the game. There is no need to say the BINGO column name. Place some kind of mark (like an X, a checkmark, a dot, tally mark, etc) on each cell as you announce it, to keep track. You can also cut out each item, place them in a bag and pull words from the bag.
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Rarefaction
Unit of frequency
Wavelength
Critical angle
Mechanical
Application of echo
Crest
Snell's law
Compression
Refractive index
Refraction
Reasons of shining diamonds
Non-mechanical
Incident and reflected angle relation in reflection
