Scale?

I was just wondering how do you play notes that are higher than the others.

For example on a keyboard/piano you have a group A - G then it goes again from A - G but at a higher note. How does this work on a whistle?

Blowing harder flips most notes up an octave to the higher note. However, some of the higher ones require different fingerings.

On a piano, there are many octaves, on a whistle there are only 2 and a bit.

How it works, scientifically, I have no idea.

hmmm I think I get you.