Solar system quiz for kids
Blast off! How much do you know about our solar system?
10 multiple-choice questions, with the answer explained after each one.
Answer each question, see why, and beat your best score.
All 10 questions and answers
Want to check an answer or run the quiz out loud? Every question is here, with the answer hidden until you open it.
- How many planets are in our solar system?
- 8
- 9
- 7
- 10
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8. Pluto was reclassified as a dwarf planet in 2006.
- Which is the largest planet?
- Jupiter
- Neptune
- Earth
- Saturn
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Jupiter. More than 1,000 Earths could fit inside Jupiter.
- Which planet is closest to the Sun?
- Mercury
- Earth
- Venus
- Mars
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Mercury. Mercury is also the smallest planet.
- Which planet is called the Red Planet?
- Mercury
- Mars
- Jupiter
- Venus
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Mars. Iron oxide (rust) in its soil makes it red.
- Which planet is the hottest?
- Mars
- Jupiter
- Mercury
- Venus
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Venus. Its thick atmosphere traps heat, so it's hotter than Mercury.
- Which planet is most famous for its rings?
- Mars
- Earth
- Mercury
- Saturn
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Saturn. Its rings are made of ice and rock.
- What is the Sun?
- A star
- A comet
- A moon
- A planet
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A star. It's the closest star to Earth.
- About how long does sunlight take to reach Earth?
- About 8 hours
- About 8 days
- About 8 minutes
- About 8 seconds
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About 8 minutes. Light travels about 150 million km from the Sun.
- Which planet spins on its side?
- Saturn
- Neptune
- Venus
- Uranus
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Uranus. Its axis is tilted at almost 98 degrees.
- What is Pluto now called?
- A dwarf planet
- An asteroid
- A star
- A moon
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A dwarf planet. It lies in the Kuiper Belt.