Available Answers

1. 1.

   Tick (√) on the right answer:

   1. A clock :
   2. Human beings :
   3. It is an example of loud noise :
   4. loudspeakers cause :
   5. Chirping of birds are :
2. 2.

   Give an example of each of these:

   1. A pleasant sound ________________.
   2. Whispering sound ________________.
   3. Warning sound ________________.
   4. Sound of animals ________________.
   5. Musical sounds ________________.
3. 3.

   Complete the sentences:

   1. We can not see sound but ________________.
   2. A whistle produces a ________________.
   3. Plants not only react to sound but ________________.
   4. Tree make ________________.
   5. Sirens alert vehicles of ________________.
4. 4.

   How do plants make sounds? Give an example to support your answer.

5. 5.

   Differentiate between pleasant and unpleasant sound.

6. 6.

   List the different types of sounds with examples.