16.Transfer of Sound Energy through Vibrations
explain that sounds are produced due to interactions between molecules of a medium caused by a vibrating source
recognise that sound transfers energy and that it takes different lengths of time to travel from one point to another through different media
*identify sounds of different pitch and relate the pitch to their frequencies
outline how the ear detects sounds in terms of the vibrations of the eardrum and ear bones, and the subsequent interpretation of sound by the brain