Longitudinal waves are movement of the particles that are parallel to the motion of the energy.
transverse waves - movement of the particles that perpendicular to the motion of the energy.
Surface wave*s - particles travel in a circular motion.
A crest is the highest point the medium rises to and a trough is the lowest point the medium sinks to.
Amplitude- the max displacement or distance
compression-longitudinal wave where the particles are closest together.A rarefaction-in a longitudinal wave where the particles are furthest apart.
https://www.brightstorm.com/science/physics/vibration-and-waves/wave-characteristics/
video!! ( also there's more sections videos of this topic that i watched )