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Moon Quiz: 12 Questions About Earth's Moon
The Moon controls our tides, lights up the night and is the only other world humans have walked on. This Moon quiz has 12 questions about its phases, history and science.
The Moon featured in the Bing Homepage Quiz for International Moon Day, which marks the anniversary of the Apollo 11 landing.
Play the Moon Quiz
Pick A, B or C for each question. The right answer turns green and a short fact explains it.
Moon Quiz Questions and Answers
Every question with its answer and explanation. Open “Show answer” after you guess.
1 Which force from the Moon is mainly responsible for ocean tides?
- A Magnetism
- B Gravity
- C Solar wind
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✓ Answer: B. Gravity
Did you know? The Moon's gravity pulls on Earth's oceans, creating two tidal bulges.
2 Who was the first person to walk on the Moon?
- A Neil Armstrong
- B Michael Collins
- C Buzz Aldrin
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✓ Answer: A. Neil Armstrong
Did you know? Armstrong stepped onto the surface on July 20, 1969; Michael Collins stayed in orbit.
3 How many people have walked on the Moon?
- A 24
- B 6
- C 12
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✓ Answer: C. 12
Did you know? Twelve astronauts walked on the Moon during six Apollo landings.
4 Why do we always see the same side of the Moon?
- A It does not rotate
- B Earth's shadow hides the other side
- C It is tidally locked
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✓ Answer: C. It is tidally locked
Did you know? It rotates once per orbit, so one face always points toward Earth.
5 Roughly how long does it take light from the Moon to reach Earth?
- A About 8 minutes
- B About 1 hour
- C About 1.3 seconds
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✓ Answer: C. About 1.3 seconds
Did you know? The Moon is about 384,400 km away on average.
6 What is the name of the dark, flat plains on the Moon?
- A Maria (seas)
- B Highlands
- C Craters
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✓ Answer: A. Maria (seas)
Did you know? Early astronomers thought they were seas; they are ancient lava plains.
7 What is a 'supermoon'?
- A A blue-colored moon
- B A full moon near its closest point to Earth
- C A moon with two shadows
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✓ Answer: B. A full moon near its closest point to Earth
Did you know? A full moon near perigee can look slightly bigger and brighter.
8 During which phase does a solar eclipse happen?
- A New moon
- B First quarter
- C Full moon
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✓ Answer: A. New moon
Did you know? The Moon must be between the Sun and Earth, which only happens at new moon.
9 What is the leading theory for how the Moon formed?
- A A giant impact with Earth
- B It split from the Sun
- C It was captured passing by
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✓ Answer: A. A giant impact with Earth
Did you know? Debris from a collision with a Mars-sized body called Theia likely formed the Moon.
10 Which was the last crewed Apollo mission to land on the Moon?
- A Apollo 17
- B Apollo 20
- C Apollo 13
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✓ Answer: A. Apollo 17
Did you know? Apollo 17 landed in December 1972; Apollo 13 aborted its landing after an explosion.
11 Does the Moon make its own light?
- A Only when full
- B No, it reflects sunlight
- C Yes, it glows
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✓ Answer: B. No, it reflects sunlight
Did you know? Moonlight is sunlight reflected off the lunar surface.
12 Which date is International Moon Day?
- A April 12
- B October 4
- C July 20
Show answer
✓ Answer: C. July 20
Did you know? It marks the Apollo 11 landing on July 20, 1969.
About the Moon
The Moon is Earth's only permanent natural satellite. The leading theory says it formed about 4.5 billion years ago from debris thrown out when a Mars-sized body collided with the young Earth. It is about a quarter of Earth's diameter, which makes it unusually large compared with its planet.
Because the Moon rotates once for every orbit, the same side always faces us. Its gravity, together with the Sun's, raises the ocean tides. Twelve astronauts walked on its surface during six Apollo missions between 1969 and 1972.
International Moon Day
The United Nations declared July 20 International Moon Day to mark the first human landing by Apollo 11 in 1969. The July 20, 2026 Bing Homepage Quiz asked about the Moon's role in tides and the event the day celebrates.
Moon Quiz FAQ
Why do we always see the same side of the Moon?
The Moon is tidally locked: it rotates exactly once per orbit, so the same hemisphere always faces Earth.
How many people have walked on the Moon?
Twelve astronauts, on the Apollo 11, 12, 14, 15, 16 and 17 missions between 1969 and 1972.
What causes the Moon's phases?
Phases depend on how much of the Moon's sunlit half we can see from Earth as it orbits.