Sound

Sound Worksheet-1

1. Time taken by an object to complete one oscillation is called______.

2. Loudness is determined by the _____ of vibration.

3. The unit of frequency is ______.

4. Unwanted sound is called ______.

5. Shrillness of a sound is determined by the ______ of vibration.

6. The numbers of oscillations in one second are called____.

Sound Worksheet-2

1. Choose the correct answer. Sound can travel through:

A. gases only                                  B. solids only

C. liquids only                               D. Solids, liquids and gases.

2. Voice of which of following is likely to have minimum frequency?

A. Baby girl       B. Baby boy       C. A man            D. A woman

Sound Worksheet-3

1. A pendulum oscillates 40 times is 4 seconds. Find its time period and frequency.

2. The sound from a mosquito is produced when it vibrates its wings at an average rate of 500 vibrations per seconds, what is the time period of the vibrations?

3. Identify the part which vibrates to produce sound in following instruments.

(a) Dholak or tabla

(b) Sitar

(c) Flute

4. What is the difference between noise and music? Can music become noise sometimes?