Use the model to explain how clapping causes the salt to vibrate without touching it.

1. Sound Generation: The process begins when you clap your hands together. This action creates a sound wave, which is a type of pressure wave.

2. Sound Propagation: The sound wave travels through the air. It moves in all directions from the source (your hands), including towards the salt.

3. Impact on Salt: When the sound wave reaches the salt, it causes the particles in the salt to vibrate. This is because the pressure wave of the sound is transferring its energy to the salt particles.

4. Visible Effect: These vibrations are what cause the salt to appear to 'jump' or move around on the surface without being touched. The salt is simply responding to the energy transferred from the sound wave.

5. Continuation of Effect: As long as the clapping continues, sound waves will keep being produced and will keep causing the salt to vibrate.

This is a basic explanation of how clapping can cause salt to vibrate without touching it, based on the principles of sound wave propagation and energy transfer.