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SAI INTERNATIONAL SCHOOL
                                                          Class8
                                                  Home Assignment
                                                   Subject-Physics
                                                       CH-Sound
                                         Subtopic- Propagation of sound




               INSTRUCTIONS:
                    Please solve or paste the worksheet in the Physics Copy.
                    For Assertion& Reason question follow the following directions.
               DIRECTION: Each of these questions contains an Assertion followed by Reason. Read them carefully
               and answer the question on the basis of following options. You have to select the one that best
               describes the two statements.
               (a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
               (b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
               (c) If Assertion is correct but Reason is incorrect.
               (d) If Assertion is incorrect but Reason is correct.
               (e) If Assertion & Reason both are incorrect.
                   1.    Assertion: Transverse waves can be produced in liquids.                               1
                         Reason: Light waves are transverse waves.
                   2.    Assertion: Two persons on the surface of moon cannot talk to each other.              1
                         Reason: There is no atmosphere on the moon.
               Fill in the blanks
                   3.    In _________ medium, sound travels fastest.                                           1
                   4.    Sound needs a ________ to propagate.                                                  1
               MCQ
                   5.    Sound propagates with maximum speed in                                                1
                             a. Gas
                             b. Liquid
                             c. Solid
                             d. All


                   6.    In which medium among wood and water, will the sound travel faster?                   1

                   7.    What is the necessary condition for sound propagation?                                1
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