Properties of waves

Amplitude
The Amplitude of the wave is the height measured in meters.

Trough
The trough is the amount of space equilibrium that is negative.

Crest
The crest is the amount of space from the equilibrium that is positive.

Wavelength λ
The wavelength is the distance between adjacent crests and it is measured in meters.

Period
The period is the time it takes for one complete wave to pass a given point, it is measured in seconds.

Frequency
The Frequency is the number of complete waves that pass a point in one second, it is measured in inverse seconds.

Oscillation
Oscillation is when an object moves back and fourth at a constant speed.

Speed
The horizontal speed of a point on a wave as it propagates, it is measured in meters per second.