Page 73 - Science Course 3 (Book 2)
P. 73

Mo10-L4a: How are Sound Waves Produced?





                                                                  Wavelength is the distance between a point on a
                                                                  wave and the nearest point just like it.

                                                                                Wavelength










                                                                  Frequency is the number of wavelengths that pass a
                                                                  given point in 1 second.

                                                                  Unit of measure : hertz (Hz)
                                Compression

                                                                      Wavelength           Wave motion


                               Compression






                                                                            Wavelength
                                Rarefaction


                                                                                                   amplitude
                                                                                                     power


                                                                                                        Time


                              Key Concept

                        How are Sound Waves Produced?
                                                                        one osoillation
                 How do vibrating objects produce sound waves?          (frequency is
                                                                          number of
                                                                       ossoillation per
                                                                           second)





                                                                  Speeds of Sound Waves

                                                                  The speed of a sound wave depends on the material
                                                                  in which it travels.


                                                                  Sound waves usually travel faster in solids than in
                                                                  liquids or gases.










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