A compressional bounday is plate boundarys that are being compressed
compressional
convergent boundaries collide but divergent boundaries move away from each other.
convergent
Cool
Compressional!
divergent boundarys
A rarefaction is found in a compressional wave
A reverse fault
divergent boundarys
they forn earthquakes
A sound wave is a compressional wave, which means the particles in the medium vibrate parallel to the direction of the wave propagation. This compression and rarefaction of particles create the variations in pressure that we perceive as sound.
Compressional waves are waves that produce compression and rarefaction when traveling through a medium. Water waves are not considered as compressional waves.