Available Answers

1. 1.

   Write T for true and F for false statements.

   1. We cannot hear animal sounds around us.
   2. Animals make sounds to communicate with each other.
   3. Any sound that causes discomfort to us is noise pollution.
   4. We should not burn fire crackers.
   5. We should maximise the use of loudspeakers.
2. 2.

   How do you come to know that a period is over in your school? Discuss.

3. 3.

   List any three sounds produced by living things and three sounds produced by nonliving things.

4. 4.

   Write two differences between pleasant and unpleasant sounds.

5. 5.

   Name three sounds that you hear in the morning at home, in school or on your way to school. Are these sounds pleasant or unpleasant?

6. 6.

   What are warning sounds? Give a few examples to explain.