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Fi consists of compres, , , , , , , , , , , , Teguound waves created when Fp, , , , , , ‘A shock wave thi es a, " something moves faster than the sPee < of hes TIT. Ma’, Sound Wave Moving pattern of high and low pressure OF : jaceme, ‘Speed of Sound How fast sound moves through an object: ., ‘Vibration pack and forth motion: 4 2. Spe, ressions in a SOUn! wi in, ‘Wavelength ‘The length between the compress!” a, iS 3. ont, 4. Soi, pr, @, \g XERCISES W.c, A. Bo, I. Choose the best answer- 7, The range of audible frequency for the re, 1 Peen human ear is B. Be, L, dl es waves trave ee a! a) 2Hz to 2000 Hz is, 1, c) vacuum d) liquids DO Boone CA, ©) 20 Hz to 20000 Hz oe, 2. Which of the following are the d) 200 Hz to 20000 Hz ;, characteristics of vibrations? a E. I, i, Frequency ii. Time period 8. Ifthe amplitude and frequency of a sound, iii, Pitch iv. Loudness Peete mmereased, which of the following, i i is true?, ; a a rn rit a) Loudness increases and pitch is higher., Sout, Nena pb) Loudness increases and pitch is, 3. The amplitude of the sound wave decides unchanged., its c) Loudness increases and pitch is oe, a) speed b) pitch lower., c) loudness d) frequency d) Loudness decreases and pitch is, lower., \, , 4, What kind of musical instrument is a, sitar?, a) String instrument, b) Percussion instrument, c) Wind instrument, d) None of these, , 5, Find the odd one out., , a) Harmonium b) Flute, c) Nadaswaram d) Violin, , 6. Noise is produced by, a) vibrations with high frequency., b) regular vibrations., c) regular and periodic vibrations., , d) irregular and non-periodic vibrations., , “Science, , II. Fill in the bianks., , 1. Sound is produced by :, , 2, The vibrations of a simple pendulum ate, , also known as, , , , 3, Sound travels in the form of, , , , 4. High frequency sounds that cannot be, , heard by you are called__ ‘, , 5, Pitch ofa sound depends on the __—, , vibration., , 6. If the thickness of a vibrating strir, increased, its pitch ____———, , 10, , ng is
