*Moon Astromony - 27.3 day cycle, 28 day cycle, new moon & full moon cause high tide, low tides at quarters.
(*Moon Astromony - 27.3 day cycle, 28 day cycle, new moon & full moon; cause; high tide)
*Moon Astromony - 27.3 day cycle, 28 day cycle, new moon & full moon
cause
high tide