Sound

Sound

1. when particles vibrate

   • caused by transfer of energy

2. frequency

   • it is the pitch of sound
   • it is mesured in hertz (hz)-the number of vibrations per second
   • high frequency-more vibrations per second

3. sound can be reflected and absorbed

   • it can be refracted like light
   • an echo is sound being reflected from a surface
   • soft things like carpets absorb sound easily

4. the speed depends on what its passing through

   • the more particles there are the faster the sound wave travels
   • the denser the medium the faster the sound travels through it