A beginner's questions - regarding the major and minor scales. Consider the C major and C minor scales for example.
- What's the significance of major and minor scales, when both sounds almost same?
- Is it possible to differentiate major and minor scales just by ears?
"significance" in question 1 means, is there any notable change in a song if I change it from C to Cm scale?
Edit 2 (23-Mar-2014):
After a search I came across this video showing the theoretical difference between Majors and Minors -