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Phases of the Moon
Contributed by: Booker
  • 1. Phases of the moon

    How long does it take for the Moon to complete one full cycle of phases (from New Moon to New Moon)?
A) 7 days
B) 18 days
C) 29.5 days
D) 365 days
E) 21 days
  • 2. Which phase occurs when the Moon is positioned between the Earth and the Sun?
A) Third Quarter
B) New Moon
C) First Quarter
D) Full Moon
  • 3. When the visible part of the Moon is increasing in size, it is said to be:
A) Waning
B) Eclipsing
C) Waxing
D) Gibbous
  • 4. What do we call the phase where exactly half of the right side of the Moon is illuminated?
A) First Quarter
B) Third Quarter
C) New Moon
D) Waxing Gibbous
  • 5. Which of the following is the correct order of phases?
A) ew Moon → Full Moon → First Quarter → Third Quarter
B) New Moon → Waxing Crescent → Waning Crescent → Full Moon
C) Full Moon → New Moon → Third Quarter → First Quarter
D) New Moon → First Quarter → Full Moon → Third Quarter
  • 6. A "Gibbous" moon is one where:
A) The moon is completely dark
B) Many stars are visible near the moon
C) More than half but less than full is illuminated
D) Less than half is illuminated
E) The moon is not visible because of clouds
  • 7. When the Moon is "Waning," the illuminated portion is:
A) Becoming smaller
B) Becoming larger
C) Turning red
D) Becoming more bright
  • 8. Which phase follows the Waxing Gibbous?
A) New Moon
B) Third Quarter
C) Full Moon
D) Waxing Crescent
  • 9. What causes the phases of the Moon?
A) The Moon spinning on its axis faster than the Earth
B) The Moon’s revolution around the Earth and the angle of sunlight
C) Clouds blocking the Moon
D) The shadow of the Earth falling on the Moon
  • 10. How much of the total Moon's surface is always illuminated by the Sun (except during an eclipse)?
A) 50%
B) 25%
C) 75%
D) 100%
  • 11. A "Crescent" moon is defined as:
A) A moon that is not visible at all
B) A moon that is less than half illuminated
C) A moon that only appears during the day
D) A moon that is almost full
  • 12. If you see a Third (Last) Quarter moon today, about how long will it be until the New Moon?
A) One day
B) About one week
C) Two months
D) Two weeks
E) One month
  • 13. During a Full Moon, where is the Earth located?
A) Between the Sun and the Moon
B) To the side of the Sun and Moon
C) Behind the Moon
D) Inside the Moon’s shadow
  • 14. What is the name of the phase that occurs between the Full Moon and the Third Quarter?
A) Waning Crescent
B) Waxing Crescent
C) Waning Gibbous
D) Waxing Gibbous
  • 15. Which phase rises at roughly midnight and sets at roughly noon?
A) First Quarter
B) Full Moon
C) Third Quarter
D) New Moon
  • 16. Why do we always see the same side of the Moon from Earth?
A) The Moon's rotation period matches its revolution period (Synchronous Rotation)
B) The Sun's gravity holds one side in place
C) The Earth does not rotate
D) The Moon does not rotate
  • 17. What do we call the "horns" or points of a crescent moon?
A) Talons
B) Rays
C) Cusps
D) Peaks
  • 18. A "Blue Moon" is most commonly defined as:
A) The second Full Moon in a single calendar month
B) The first New Moon of the year
C) A moon that happens during a solar eclipse
D) A moon that actually turns blue due to dust
  • 19. What is the term for the line that separates the dark side and the light side of the Moon?
A) The Horizon
B) The Terminator
C) The Eclipse Line
D) The Equator
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