Originally Posted by: compart1I thought that bass was the same as guitar, just lower octaves... and two less string.. I might be wrong cause I don't play bass..

You are correct! There is a bit more to it, but you get the gist.

"The simplest difference between guitar and bass guitar is the pitch range of the instruments. Bass guitar plays notes an octave lower than a regular guitar. Think of the song 'Another One Bites the Dust' by Queen. The first few notes you hear are the sound of the bass guitar."

This article summarizes it very well:
http://www.studybass.com/gear/bass-guitar-buying-guide/guitar-and-bass-differences/