[allthumbs]

Use the search bar to find posts on scales.
Read some of these threads
http://www.guitarforbeginners.com/fo...splay.php?f=70
and here.
http://www.guitarforbeginners.com/fo...splay.php?f=91
and here.
http://www.guitarforbeginners.com/fo...splay.php?f=69
You will easily find the threads about scales.