1) What is vibration? a) how loud a sound is b) the loudness or softness of a sound c) the quick back and forth movement of matter 2) An ________ is a reflected sound. a) Vibration b) Echo c) Pitch d) Volume 3) Sound waves travel the FASTEST through _____________. a) gases b) space c) solids d) liquids 4) The hearing range of human ear is a) 20 Hz to 20,000 Hz b) Less than 20 Hz c) 20 Hz to 25,000 Hz 5) ____________ is the highness or lowness of a sound. a) Amplitude b) Volume c) Pitch d) Vibration 6) What is frequency? a) the number of vibrations per second b) how high or low a sound is c) the back and forth movement of matter d) the loudness or softness of a sound 7) What is a larynx? a) It is animal is Africa b) It is sound waves c) It is a muscle that holds vocal cords 8) Which of the following is the inverse of time period? a) Amplitude b) Frequency c) Pitch d) Quality 9) The maximum displacement of a body from its mean position is called a) alimplitude b) (b) Amplutide c) (c) Amplitude d) (d) Amplatide 10) When the amplitude of vibration is large, sound produced is a) (a) No sound b) (b) feeble c) (c) loud d) (d) No relation between amplitude and sound 11) Ryan makes an instrument from a drinking straw as shown. If he cuts the straw in half, what will happen to the pitch? a) decreases b) increases c) it will remain the same d) there is no sound 12) How is sound produced? a) By the vibration of particles b) By the transfer of particles c) sound travels fast d) sound doesn't travel 13) How does sound travel? a) Sounds travels in waves b) sound travels slow 14) Why is sound able to travel faster through a solid than a gas? a) Gas molecules are packed tightly. b) Sound does not travel faster through a solid than c) Solid molecules are packed tightly. d) Gas molecules move slowly. 15) Why do we see lightning before we hear the thunder? a) Our eyes trick us b) Light travels faster than sound c) they're two separate things 16) Sound does not travel in space because a) Space is too far away. b) There is no matter in space. c) Space is the final frontier d) Space has planets. 17) The volume of a sound is measured in units called ________ a) decibels b) liters c) sound waves d) all of the above 18) Vibrating part in musical instrument Tabla is a) string b) Stretched Membrane c) Air Column 19) Vibrating part in musical instrument Flute is a) string b) Stretched Membrane c) Stretched Membrane d) all of the above 20) What is the frequency of ultrasonic sound? a) 20 Hz b) Less than 20 Hz c) 20 Hz to 20,000 Hz d) More than 20,000 Hz 21) What is the frequency of infrasonic sound? a) 20 Hz b) Less than 20 Hz c) 20 Hz to 20,000 Hz d) More than 20,000 Hz 22) voice of female is of __________ pitch. a) high b) low 23) voice of men is of _______ pitch. a) high b) low 24) which of these is the SI unit of amplitude a) Meter  b) Meter per. sec c) Hertz 25) which of these is the SI unit of frequency a) Meter b) Meter per. sec c) Hertz

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