Which song is the opening track on Black Sabbath's debut album?

“Which song is the opening track on Black Sabbath’s debut album?” — The answer is “Black Sabbath.” The song opens the band’s self-titled 1970 debut and establishes its ominous, slow-moving sound before the rest of the record begins.

The track was written by Ozzy Osbourne, Tony Iommi, Geezer Butler, and Bill Ward. Its famous introduction uses storm effects, church bells, and a highly dissonant guitar figure built around the tritone, an interval long associated with unease in Western music. That combination helped make the song an early landmark in doom metal and heavy metal.

Black Sabbath recorded the album in a remarkably short session at Regent Sounds in London on 16 October 1969. The record was released in the United Kingdom on 13 February 1970, a Friday the 13th. The opening song is sometimes confused with “The Wizard” or “N.I.B.” because both are prominent early Sabbath tracks, but the running order places “Black Sabbath” first, followed by “The Wizard.”