Sound is all about vibrations. The source of the sound vibrates, bumping into the air molecules nearby, which in turn bump into their neighbours and so forth. This results in a wave of vibrations through the air to the eardrum, which in turn vibrates. What the sound wave will sound like when it reaches the ear depends on a number of things such as the medium it travels through and the strength of the initial vibration.
In the following activities, students will use simple supplies to create, visualize, and feel sound waves, investigate vibration and its role in producing sound, and make their own percussion instruments.