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Metonic cycle: Quiz


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Question 1: Adding the 11 year cycle to 17 or 18 Metonic cycles creates the more accurate cycles of 334 years in 4131 lunations and 353 years in 4366 lunations (see ________).
Islamic calendarLunisolar calendarByzantine calendarGregorian calendar

Question 2: This cycle can be used to predict ________, forms the basis of the Greek and Hebrew calendars, and is used in the computation of the date of Easter each year.

Question 3: Another use is in computus, the calculation of the date of the ________ feast of Easter.
ChristianJesusChristianityCatholic Church

Question 4: Examples of a real harmonic lock would be Mercury, with its 3:2 spin-orbit resonance or other ________.
PlutoSolar SystemNatural satelliteOrbital resonance

Question 5: They measured the moon's motion against the stars, so the 235:19 relation may originally have referred to sidereal years, instead of ________ as it has been used in various calendars.
LongitudeTimeUniversal TimeTropical year

Question 6: The ________ astronomer Meton of Athens observed that a period of 19 tropical years is almost exactly equal to 235 synodic months, and rounded to full days counts 6940 days.
Greek diasporaGreeceGreek languageGreeks

Question 7: The Metonic cycle or Enneadecaeteris in ________ and calendar studies is a particular approximate common multiple of the tropical year and the synodic (lunar) month.

Question 8: A lunar year of 12 synodic months is about 354 days on average, 11 days short of the 365-day ________.
Tropical yearLongitudeUniversal TimeTime

Question 9: Therefore, in a ________, every 3 years or so there is a difference of more than a full lunar month between the lunar and solar years, and an extra (embolismic) month should be inserted (intercalation).
Lunisolar calendarIslamic calendarByzantine calendarGregorian calendar


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