Question

B. Fill in the blanks with the correct words.

1. A sound is produced because of ________
(vibrations/molecules).

2. ________(Music/Sound) is our basic means of communication.

3. Sound needs a ________
(source/medium) to travel in.

4. The unit of frequency is _______
(hertz/seconds).

5. Time period is measured in ______
(hertz/seconds).​

Answer 1

Answer:

Molecules2music3medijm 4hertz5seconds

Answer 2

Answer:

1.Vibrations

2.Sound

3.Medium

4.Hertz

5.seconds