Sound

Sound Worksheet-4

11. How is sound produced?

12. Do all bodies can produce sound?

13. What do you feel when you touch a sound producing school bell?

14. Touch the bell when it stops producing sound. Can you feel the vibrations?

15. The bell which is not producing sound doesn’t vibrate. What do you understand by this?

16. What do you understand by vibrations?

Sound Worksheet-5

31. Name the organs in human which receives sound.

32. What is outer part of ear called?

33. What is ear drum?

34. What is oscillatory motion?

35. What do you mean by frequency?

36. Write the unit of frequency.

37. Define hertz.

Sound Worksheet-6

51. What do you mean by air pollution?

52. What is noise pollution?

53. What sources in home may lead to noise?

54. What is unit of loudness?

55. What is the loudness of a normal conversation?

56. Write a common ill effect of noise pollution.

57. Write any one method to control noise pollution.