NCERT Exemplar I — task. Science CBSE, Class 8.

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1. A list of mediums is given below. (i) wood (ii) water (iii) air (iv) vacuum In which of these mediums can sound travel?

i & ii only
i, ii & iii only
iii & iv only
ii, iii & iv only

2. The loudness of a sound depends on:

its amplitude
its time period
its speed
its frequency

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