Musical Question

[DnEbook]

This has been bugging me for a while
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If a Gmajor scale has the notes G A BC D E F# G
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Why does a G7 chord have the notes G B D F
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I understand the W WH W W WH theory but i cant work out why the F note in G7th is not played as a sharp?

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Example:

http://www.google.com.au/imgres?img...a=X&ei=DLmSUrmTLOaoiAfKkIDoAw&ved=0CEgQ9QEwCA

 

[enlytend]

Because G7 isn't a chord which "belongs" to the KEY of G major. It's the dominant 7 (dominant refers to the 5th note of the scale) in the key of C major.

A dominant 7 is made from the 5th, 7th, 2nd and 4th notes of the diatonic scale (which, in the key of G, is g-a-b-c-d-e-f# ...)

Dominant 7 chord in the key of G is D7 (d f# a c)

BTW, a G7 chord with an F# instead of an F is called a G Major 7 - you won't see maj7 chords as much in popular music - sometimes ballads, more in jazz, show tunes ...

 

[DnEbook]

ummm .....show tunes

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Many thanks !