ACTIVITY 1: read the samples classification paragraph and fill in the outline below.

sound as many properties there are pitch quality and loudness pitch refers to the highness and lowness of notes when vibrations are fast high notes are heard when vibrations are slow notes are heard another property of sound is quality which refers to the shape of the sound waves on objects produces the smooth er the shape of the waves the better is the quality of the sound and more pleasing it is to the ears loudness on the other hand returns to the volume or sound pressure produced by the vibrations of an object if the sound produces high pressure then the sound becomes louder ​