A sinusoidal or sine wave is an example of an ocean wave. Below is a graph of a sine wave.

Important terms to be able to define:

• wavelength - the distance between crests or trough
• amplitude - the height of the wave from average or zero to peak
• crest - the top of the wave
• trough - the bottom of the wave
• elevation - the wave height from the trough to the crest

Read more about it at the Wikipedia website below: