Originally Posted by: axe2I'm a little unsure of what it means ,let's say naming notes of any scale,chord ect,and there's a root ok no prob there now there's a min third,fourth,ect.can anyone pls help me understand this pls.thanks,every scale or chord that's all I hear but no explanation ,another one is a perfect 5th.......

We name intervals in order to tag each unique sound with a unique name. The sound of a major 3rd interval is the sound that happens when we play 2 notes that are 2 whole steps (or 4 frets) apart. The sound of of a minor 3rd is the sound that happens when we play 2 notes that are 1 1/2 steps (or 3 frets) apart.

Play the note C, then play the note E. The distance between them is a major 3rd. Play them together. That is the sound of the interval called a major 3rd.

Play the note C, then play the note E-flat. The distance between them is a minor 3rd. Play them together. That is the sound of the interval called a minor 3rd.

All the interval names are how we keep all those different possible sounds
mentally identified & organized.

I cover the topic of intervals in depth in GF2.

http://www.guitartricks.com/tutorial.php?input=362

Then I use that discuss of intervals to cover scales in depth.

http://www.guitartricks.com/tutorial.php?input=363

http://www.guitartricks.com/tutorial.php?input=445

Have a look through those first. Then, if you have more questions I've covered a lot of those in my instructor forum. For example:

http://www.guitartricks.com/forum/showthread.php?t=38333&highlight=major+3rd+scale+interval

Hope this helps! Ask more if necessary. :)