Here's a breakdown of wave terminology:

* Amplitude: The vertical distance from the crest (highest point) or trough (lowest point) of a wave to its resting position (the undisturbed level).

* Wavelength: The horizontal distance between two consecutive crests or troughs.

* Frequency: The number of waves passing a fixed point in a given time (usually measured in Hertz, Hz).

* Period: The time it takes for one complete wave to pass a fixed point.

Let me know if you have any other questions about waves!