8L summery sheets

8L summery sheets

1. sound is a form of energy, sounds are made when things vibrate

   • the particals in solids liquids or gases, needs a substance to pass through on the vibrations
     • they can not travel through a vacume

2. the spped goes solids , liquid and then gases

   • this is because the particals are very close togtherand in a solid there is more engey to pass on to another
     • sound travles in all diretion becuase they have more vibrations to bounce across

3. the frequency is the number of vibrations per seconds

   • hertz (HZ)
   • high pitched dounds have a high frequany and low pitched sounds have a low frequany
     • the distance between the waves is called the wave length
       • measured between the top of one wave to the next

4. the londness of the sounds depends on the amplitude

   • the loundness of the sound wil depend on the amplitude,
     • the louder notes have more energy and the wave has a bigger amplitude

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