An example of a transverse wave would be the "wave" in a stadium. In a transverse wave, energy moves to the right.
the max displacement of a pulse/wave
the distance from crest to crest or trough to trough.
the highest point of a wave
the lowest point of a wave
An example of a longitudinal wave is a sound wave. One wavelength of a longitudinal wave is compression to compression or rarefaction to rarefaction.
the part of the wave that is close together and at high pressure
the part of the wave that is far apart and at low pressure