1) Sound is produced when there is no vibrations a) True b) False 2) Sound can travel through solids and gases only . It can't travel through liquids a) False b) True 3) The unit of measuring sound is ............................. a) Cm b) dB c) Db d) Kg 4) The unit for measuring sound is called decimles a) True b) False 5) Sound can't travel through vacuum a) True b) False 6) We can measure sound using ..................... a) Balance b) Sound level meter c) Meter 7) When we pump out air from Jar , we will hear bell ringing a) True b) False 8) We can hear sound that are less than 0 dB a) True b) False 9) We can hear sound that is 140 dB a) True b) False 10) Sounds above 160db can cause ear damage a) True b) False 11) The unit for measuring sound is decibles a) True b) False 12) The pitch is how loud the note is a) False b) True 13) The Volume is how loud or quiet something is a) True b) False 14) Low or high is for a) volume b) pitch 15) loud or quiet is for a) volume b) pitch 16) Sound travels five times faster in water than air a) False b) True 17) Sound travels through different materials with different speed a) yes b) No 18) we can hear from .................... to ................... a) 0 to 165 b) 0 to 160 c) 6 to 180 d) less than 0 and more than 160 19) Hania is playing drums . She wants to make the sound louder a) Hit Hardly b) Hit softly 20) Lili is playing guitar , she wants to make the pitch higher a) smaller guitar , thick strings and shorter strings b) larger guitar , thick strings and longer strings c) smaller guitar , thin strings , shorter strings 21) Layan is playing guitar , she wants to make the pitch low a) Large guitar , long strings and thick strings b) smaller guitar , thin strings , shorter strings c) larger guitar , thin strings and longer strings 22) Hitting drum quieter . Which word describes loud or quiet? a) Pitch b) Loudness c) Volume d) decibles 23) Hitting violins harder and having more violins will make sound a) Louder b) Quieter 24) Using smaller violins , shorter strings and thinner strings will make the pitch a) low b) loud c) quiet d) high

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