1) A thinner string of a guitar gives a ................. sound a) loud b) soft c) high d) low 2) The slower the vibrations, the ............... the pitch of the sound. a) higher b) lower c) louder d) softer e) bigger f) smaller 3) The following gives a high pitch EXCEPT..... a) tighten skin drum b) shorter air pipe of wind instrument c) tighter string d) strike harder on a ukulele e) smaller drum f) thinner string 4) For the investigation "Which materials muffle sound the best" , how do you make it a fair test? a) different materials are used b) measure the sound with different volume of loudness c) use the same thickness to wrap the source of sound d) repeat the experiment at least three times 5) How are sounds made? a) sounds are made when we touch an object b) Sounds come from light sources c) Sounds come from particles d) Sounds are made from vibrating objects 6) Vibrations travel as ............... ................. a) sound waves b) sound rays c) sound reflection 7) Sound travels through a medium, solids, liquids and gases. Why do you think sound travels best through solids? a) Particles in solid move around each other easily. b) The particles of solids are closely packed together and can bump one another easily.  c) Sound travels easily when there is space in between the particles 8) What do you call how loud or soft sound is? a) pitch b) decibel c) volume d) vibrations 9) When a material is good at muffling sound, it means ....... a) the material absorbs sound and make quieter and less clear b) sound waves are reflected by the material c) an echo is produced d) the pitch is changed e) the sound becomes louder 10) What do we wear to muffle sound? a) silencers b) head phones c) ear phones d) Ear defenders 11) How does a wind instrument make sound when we blow down or across the tops of hollow pipes? a) The column of air is shorter b) The air vibrate inside the pipe c) The air vibrate outside the pipe d) The column of air is longer 12) How does a recorder player changes pitch? a) by opening and closing holes along the instrument's length b) by blowing gently or harder 13) Woodwind pitch depends on the amount of air that is vibrating. Which of the following sentence is TRUE? a) The larger the amount of air, vibrations are faster. Higher pitch is produced b) The smaller the amount of air, vibrations are faster. Lower pitch is produced c) The larger amount of air, vibrations are slower. Lower pitch is produced d) The smaller the amount of air, vibrations are slower. Higher pitch is produced

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