Page 92 - Genius Kidz Prudence Learning Sc-8

Activity 2

Vibrations that generate sound are a type of oscillatory motion already studied in previous classes. So, students
are expected to answer the following :
(a) One complete vibration :
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(b) Amplitude :
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(c) Time period :
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(d) Frequency and its unit :

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Activity 3
Classify the following sounds as soft or heavy.
(a) Adult's voice
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(b) Child's voice
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(c) Sitar strings
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(d) Tiger's roar
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Supersonic jets fly faster than sound. So you are able to hear them only after the jet passes you.

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