Watch the Chords & Single Notes online guitar lesson by TrueFire from Play Rock Guitar 1: Quick-Start for Beginners

Of course most rock songs are a combination of chords and single note riffs. This is Iron Man from Black Sabbath and will give you a great workout with both single notes and especially power chords. The power chords are moving around pretty quickly so take your time and just work on the specific parts that are the hardest for you and you will have it up to speed in no time!