explain why sound is a useful and versatile form of communication
explain that sound is produced by vibrating objects and that the frequency of the sound is the same as the frequency of the vibration of the source of the sound
outline the structure of the human larynx and the associated structures that assist the production of sound
plan and perform a first-hand investigation to gather data to identify the relationship between wavelength, frequency and pitch of a sound
gather and process information from secondary sources to outline and compare some of the structures used by animals other than humans to produce sound
