7L Sound

• Sounds are made when something vibrates. These vibrations transfer energy and so sound travels
• Some sounds are loud and some arew soft. This is the intensity of the sound. Sounds with a high intensity are often said to have a high volume
• Sounds can be high or low. This is the pitch of the sound. The pitch and volume of the sound depend on the way an object vibrates to make a sound
• The number of vibrations each second is called the frequency.
• The units for frequency are hertz (hz)
• The longer the fork the lower the pitch because the prongs vibrate lower
• The volume of a note depends on the size of the vibrations. The size of a vibration is its amplitude. The bigger the amplitude, the louder the note.
• Frequency describes the number of vibrations per second is Frequency
• Sounds are made by vibrations
• Pitch describes how low or how a sound is
• Amplitude is the size of vibrations
• Intensity is the loundness of a volume or sound