Scale – A number of notes arranged in a specific order of their pitch (frequency)

(Pronounced scayl)

To remember what scale means use the following mnemonic:

I scaled (scale) the wall using the notes arranged in a specific order.

A pitch of a note can be measured in a unit called hertz. A note that is vibrating at 256Hz will be caused by a sound wave that vibrates at 256 times a second. This will be middle C on the piano. 

In music, a scale is a set of notes in a specific order of their pitch. If the pitch becomes higher it is called an ascending scale. If the pitch becomes lower it is called a descending scale. 

The steps between the pitches are measured in:

Tones = Whole step

Semitones = Half step

The sequence of steps will be different for different scales.