Scale also means ladder in latin
Imagine music as ladder & each rung is a note.
Like a ladder, musical notes can only go up or down in pitch.
There are only 12 different notes in music so there are only 12 rungs on the ladder.
Let me repeat that a little louder THERE ARE ONLY 12 DIFFERENT NOTES IN MUSIC!!!
Not much right : )
All we do in music is climb up & down the ladder either in sequence e.g. 1 2 3 4 3 2 1
or by jumps
eg. 1 3 5 7 5 3 1