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Major 2nd - Happy Birthday & Friday (Rebecca Black)
Major 3rd - Kumbaya My Lord & Fairytale (T-Swizzle) “Today was a fairytale”
Perfect 4th - Advance Australia Fair, Star Wars, Here Comes the Bride
Perfect 5th - Twinkle Twinkle Little Star, Alphabet Song
Major 6th - My Bonnie Lies Over the Ocean, Man in the Mirror “I’m starting”
Major 7th - Don’t Know Why (Nora Jones) “I Waited...”
Perfect Octave - Somewhere Over the Rainbow

Minor 2nd - Jaws & She Will Be Loved (Maroon 5) - “I don’t mind spending every day”
Minor 3rd - Greensleves & Katniss’s whistle from The Hunger Games
Tri tone - The Simpsons
Minor 6th - Young (FUN) “So let’s set the world on fire“ & the second interval in the sythesizer part of “Yeah” by Usher
Minor 7th - Somwhere from Westside Story “There’s a”

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7th chords are all made up of major and minor 3rds stacked together in different ways.
Major 3rds are 5 movements e.g. C-> C# -> D -> D# -> E
Minor 3rds are 4 movements e.g.
C-> C# ->D ->Eb
In the example below, Major 3rds are in orange and Minor 3rds are blue:

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A cadence is the last two chords a composer uses to finish a song. There are 4 types of cadences that fit into 2 categories: