Multiple choice How many phases of the moon are there? 8 2 10 100 Reveal answer Fill a bubble to check yourself A Correct answer Explanation There are 8 distinct phases of the moon: New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Last Quarter, and Waning Crescent. The cycle takes about 29.5 days to complete.