Sound

SP
by Saumya Pandey4 views·Updated Feb 28, 2022
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  1. Hello students.
  2. This is some abandoned
  3. and today we are going to perform
  4. activity based on the propagation of sound
  5. in air, water and solid.
  6. First of all,
  7. we will see how the sound propagates in case of air and water
  8. to perform this activity,
  9. let us
  10. let me share share my screen
  11. so that
  12. you can see the procedure
  13. on the right hand side of my screen. You can see the slide,
  14. let me zoom it
  15. to perform the first activity.
  16. You have to take
  17. two balloons
  18. And fill one balloon with water
  19. and other with air.
  20. Now hold the balloon filled with air
  21. near your ear
  22. and rubber finger on the balloon
  23. and try to listen to the sound
  24. after that
  25. repeat the same procedure
  26. for balloon
  27. filled with water.
  28. Students,
  29. do you notice any difference in the sound coming
  30. from the water and the air balloon?
  31. Let me share
  32. the observation and the conclusion of this activity with you.
  33. You will notice that
  34. the sound
  35. is more clear in case of balloon filled with water
  36. as compared to that in case of
  37. air balloon.
  38. So students,
  39. it means that
  40. sound is propagated
  41. more clearly through water as compared to
  42. in air.
  43. So with this activity,
  44. we got to know that sound is more easily propagated or passed through water or liquid
  45. as compared to
  46. air.
  47. Now, students,
  48. let us see
  49. the second activity
  50. in which
  51. we will see how the sound propagates. In case of solids.
  52. To do this second activity,
  53. you have to stand at the end of big table
  54. and make a friend
  55. stand at the other end of the table.
  56. Now
  57. you have to ask the friend
  58. to knock on the table lightly
  59. and listen to the sound by standing.
  60. Now
  61. second time you have to place your ear on the table
  62. and
  63. ask your friend again
  64. to knock,
  65. knock on the table.
  66. Students,
  67. do you notice any difference
  68. for the sound
  69. coming
  70. when you place your ear on the table
  71. and
  72. the sound which was coming when you were standing
  73. near the table.
  74. Let us see the observation and conclusion of this activity.
  75. You can notice that
  76. sound is faint
  77. when we hear it by standing
  78. and it is more clear when we listen it by placing here on the table.
  79. So students,
  80. it means that
  81. sound is propagated
  82. more clearly in solid as compared to
  83. air.
  84. So with these two activities
  85. we've got to know that
  86. sound is propagated
  87. most clearly in solid
  88. and then through liquid
  89. and then through air.
  90. So students,
  91. I hope you all have understood
  92. that the sound is propagated
  93. most precisely in solid,
  94. then liquid, and then
  95. gasses are air.
  96. Now
  97. you can also perform these activities
  98. with your friends
  99. at your home.
  100. Thank you