Sound

Sound

1. Vacuum

   • sound can not travel in an empty space

2. The amplitude of a sound wave tells us how loud the sound is.

   • the louder the sound the bigger the amplitude (how tall)

3. The frequency is measured in hertz (Hz)

4. The higher the frequency the higher the pitch

   • the wider apart the sound wave is the deeper it is

5. sound is a vibration that has to travel through a medium to make a sound

   • this is why we do not here explosions in space
     • because it is 'vacuum'