Available Answers

1. 1.

   Fill in the blanks.

   1. Some sound hurt our ___________ if we listen to them for long.
   2. The hinges of an old door make a ___________ sound when the door is opened or closed.
   3. An example of warning sound ___________.
   4. Chattering of ___________.
   5. Chirping of ___________.
   6. Howling of ___________.
2. 2.

   Fill in the blanks.

   1. Listening to loud _____________ can be harmful to our ears.
   2. Noise _____________ does not allow people to sleep properly.
   3. _____________ of traffic on road causes lots of noise pollution.
   4. Noise pollution causes loss of _____________ and _____________.
   5. Avoid watching television and listening to radio at high _____________.
3. 3.

   Choose the correct option.

   1. A clock produces
      1. creaking sound
      2. hissing sound
      3. rustling sound
      4. tick-tock sound
   2. Which of the following produces a rustling sound?
      1. Table
      2. Leaves
      3. Teakettle
      4. Doors
   3. Which one of these produces a whirring sound?
      1. Vacuum cleaner
      2. Piano
      3. Dog
      4. Fan
   4. A fire alarm produces
      1. musical sound
      2. loud noise
      3. hissing sound
      4. chattering sound
   5. Noise pollution is generally caused by
      1. bursting of crackers
      2. loudspeakers
      3. aircraft
      4. All of these
4. 4.

   Give two examples of the following.

   1. Warning sound
   2. Common object's sound
5. 5.

   How does a clock produce a soft "tick-tock" sound?

6. 6.

   When does a door produce a creaking sound?