What is the space from the crest to the trough of a wave called?

The space from the crest to the trough of a wave is called the amplitude. Amplitude specifically refers to the distance from the midpoint of the wave to the crest or trough. In contrast, wave height is defined as the distance between the crest of the wave and the trough, which can sometimes lead to confusion. Wavelength refers to the distance between two consecutive crests or two consecutive troughs of a wave, while wave depth pertains to the vertical distance from the water surface to the seabed. Understanding these definitions helps clarify the characteristics and behavior of waves in various scientific contexts.