Blowing air into a whistle causes air to vibrate inside the whistle.
When an object moves or vibrates, the air molecules around the object also vibrate.
Blowing air into a whistle causes air to move inside the whistle.
Blowing air into what causes air to move inside it?
Options:
  heat
  solid plastic
  solid glass
  solid rock
  whistle
  sound
  a chime
  waves