Earth tide lunar and the solar tidal maxima and minima (bulges and depressions) add together for the greatest tidal range at particular latitudes. At first- and third-quarter phases of the moon, lunar and solar tides are perpendicular, and the tidal range is at a minimum. The semi-diurnal tides go through one full cycle (a high and low tide) about once every 12 hours and one full cycle of maximum height (a spring and neap tide) about once every 14 days. The development of a systematic theory of Earth tides was started by George H. Darwin in 1879, and was then furthered by
Full Moon (Brandy album) 2001, but plans were scrapped. The first song is the title track "Full Moon", producer Mike City's only contribution to the album. A piano-dominated up-tempo song, Norwood characterised it as urban contemporary, explaining that "Full Moon" is "pop and R&B at the same time [but] has a lot of elements to it." Lyrically, the song deals with a love at first sight during a full moon night. "I Thought", a Jerkins-crafted song about female empowerment, features electro bass lines and crunchy drums that "propels [it] away from the traditional R&B sound in to a new arena," according to Christian Hopwood