* The medium itself does not travel with the wave. Think of a wave in a rope. The rope itself doesn't move across the room; it just oscillates up and down. The wave pattern (disturbance) moves along the rope.
* The wave travels *through* the medium. The energy of the wave causes particles in the medium to vibrate. These vibrations transfer the energy from one particle to the next, creating the wave motion.
* The medium provides the path for the wave's energy transfer. Without a medium, there's nothing for the wave to vibrate, and it cannot propagate.
Example:
Imagine a stadium wave. People stand up and down, creating a wave that moves around the stadium. The people (the medium) don't move from their seats, but the wave itself moves through them.
Key takeaway:
Mechanical waves need a medium to travel. The medium itself doesn't move with the wave, but the wave's energy propagates *through* the vibrations of the medium.
