1) When an object _________, it makes the air around it vibrate.  a) vibration b) vibrate c) vibrant 2) We ________ sounds when vibrations reach our ears. a) hear b) smell c) see 3) We use sounds to _________, for warning, and communication. a) decoration b) instruments c) entertain 4) Animals also use sounds to attract mating partners and warn one another of ______. a) entertainment b) danger c) celebration 5) We can use musical __________ as well as other objects to produce sounds. a) pitch b) vibrations c) instruments 6) Different objects _________ different sounds. a) produce b) communicate c) emergencies 7) A roaring tiger's sound is _________. a) loud b) high-pitched c) low-pitched 8) A mouse squeaking makes a ________ sounds. a) high-pitched b) soft c) low-pitched 9) An instrument that you can pluck is _______. a) flute b) guitar c) cymbals 10) An object that you can strike is a _________. a) trumpet b) piano c) drum

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