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1) The most important characteristic of a 'music' is its a. bass effect b. harmony c. rhythm d. scale
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2) Frequency is measured by unit which is called a. meter b. hertz c. watt d. ohm
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3) Animal that uses echoes is known as a. bat b. snake c. rat d. rabbit
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4) The higher the frequency, the more the a. note of sound b. depth of sound c. amplitude of sound d. wavelength of sound
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5) Sounds of dead leaves and cats are known as a. loud sounds b. soft sounds c. high pitched sounds d. low pitched sounds
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6) Sound travels fastest in solids because the a. particles vibrate more vigorously b. particles move fast c. collision of particles is greater d. particles are closely packed
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7) When two or more notes with different pitches are sounded together, a. disco is created b. peace is created c. harmony is created d. beat is created
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8) A long thick tube produces a. low note b. high note c. deep note d. low pitched note
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9) Wind instruments make sound by allowing air to a. cut through the tubes b. vibrate through the tubes at different lengths c. increase the frequency d. decrease the frequency
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10) When a note is played by a string instrument, it produces a. single vibration b. double vibrations c. multiple vibrations d. rhythm
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11) If a tuning fork makes a single musical note, it will produce a. a wave b. a frequency c. a wave front d. an amplitude
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12) An example of wind instrument is a. drum b. flute c. piano d. violin
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13) To shape a metal a. ultrasound can be useful b. gamma-rays can be useful c. x-rays can be useful d. infrasound can be useful
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14) The height of a wave is known as a. amplitude b. wave front c. volume d. space of sound
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15) Ultrasound is used instead of x-rays because x-rays can a. damage body cells b. damage the body c. damage the vessels d. stimulate the growth of cancer cells
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16) In water the speed of sound is a. 100 m/s b. 200 m/s c. 1500 m/s d. 2000 m/s
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17) An example of 'percussion' is a. drum b. piano c. saxophone d. violin
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18) The number of sound waves sent per second is known as a. wave front b. wavelength c. frequency d. amplitude
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19) Sound travels faster in liquids than air because a. liquid is more dense b. the particles in liquid are close c. the particles in liquids have less energy d. the particles in liquids collide less as compare to particles in air
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20) Echoes are useful for bats because through it bats can detect a. size of the object b. position of the object c. size and position both d. state of the object
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