1. Amplitude
The max. distance the particles move from the “rest position” to:
The more energy a wave has → The greater its amplitude
Compression or rarefaction
Crest or trough OR

2. Wavelength The distance between two corresponding parts of a wave.
Measured in m, cm, mm
From:
Crest to crest
Trough to trough
Compression to compression

3. Frequency
The number of complete waves to pass a point in a certain amount of time.
Measured in hertz (Hz)
1 wave/second = 1 Hz
2 waves/second = 2 Hz

4. Speed How far a wave travels in a given length of time.
Speed = Wavelength x Frequency
If the medium does not change then the speed remains constant. S WL
Freq