1) When a guitar string is plucked, the sound is produced because.. a) The wood expands b) The nails grow c) The string changes colour d) The string vibrates  2) In a tuning fork, sound is produced when the prongs.. a) Bend permanently b) Vibrate back and forth c) Stay completely still d) Change colour 3) Which of the following correctly describes how sound travels after being produced? a) Vibrations move through a medium as waves  b) Vibrations turn into light c) Vibrations disappear instantly d) Vibrations only occur in vacuum 4) In human speech, the sound is produced mainly by the.. a) Teeth b) Vocal cords c) Tongue d) Lungs 5) The vibration of a loudspeaker diaphragm produces sound by.. a) Directly moving air molecules b) Producing light flashes c) Heating the air d) Generating magnetic fields only 6) Which of the following is NOT a vibrating object that can produce sound.. a) Tuning fork b) Guitar string c) Light bulb d) Drum skin 7) The sound of thunder is produced when.. a) Clouds vibrate b) Air vibrates due to rapid expansion c) Light bounces in the sky d) D. Water evaporates quickly 8) Which statement about sound production is correct? a) All sounds are made by vibrating objects b) Only musical instruments can make sound c) Vibrations only occur in air d) Sound can be produced in a perfect vacuum 9) Which of the following correctly matches instrument and vibrating part? a) Bell – vibrating clapper only b) Flute – vibrating metal keys c) Drum – vibrating wooden shell d) Piano – vibrating string 10) When a door slams shut, the sound you hear is mainly caused by: a) Light reflection b) Expansion of wood c) Heat generation d) Vibration of the door and air

Explain how sound is produced

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