Available Answers

1. 1.

   Fill in the blanks.

   1. _________ is the length of the wave.
   2. A high frequency will result in ________ sound.
   3. A sound wave of single frequency is called a _________.
   4. The number of oscillations completed in one second is called __________.
   5. _________ allows us to distinguish between two sounds of the same pitch and loudness.
2. 2.

   State whether the given statements are true (T) or false (F).

   1. Sound requires a medium ( solid, liquid and gas) for it's propagation.
   2. The lesser the distance between source and listener, lower is the loudness.
   3. Sound travels in the form of longitudinal waves.
   4. The surface area of the vibrating body directly affects the loudness of a sound.
   5. The percussion instruments like drum , tabla and dholak produce sound when their tightly stretched membrane is struck.
3. 3.

   Match the columns.

   Column A	Column B
   1. Loudness	a. Noise pollution
   2. Frequency	b. Hertz
   3. Compression	c. Decibel
   4. Rarefaction	d. Region of high density
   5. Heavy traffic	e. Region of low density

4. 4.

   Explain Amplitude.

5. 5.

   Explain Frequency.

6. 6.

   Explain Monotone.