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18  Mike makes a bell using a pot and a mallet.









                                          pot
                                                                        mallet




               He hits the pot with the mallet.

               The bell makes a quiet sound.

               (a) Describe one way he can increase the volume of sound made by the bell.



                                                                                                           [1]


               (b) Mike wants to measure the volume of the sound.

                   Which instrument measures the volume of sound?

                   Circle the correct answer.

                                                   loud level meter

                                                 musical level meter

                                                  pitch level meter

                                                 sound level meter

                                                 volume level meter
                                                                                                           [1]


















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