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