Quizzes
Planets Quiz: Solar System Quiz
This planets quiz has 49 solar system questions with answers: the order of the planets, their moons, how long a year lasts on each one and more, with four answers to pick from.
Planets Quiz
Pick one of four answers. Use the 1 to 4 keys on a keyboard.
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The planets quiz mixes 8 easy, 13 medium, 22 hard, and 6 impossible questions and is made for kids, students and anyone learning the solar system. 13 of the questions come from the Quiz Zoomies video "How Good Is Your Knowledge of Space? 40 Questions Space Quiz", and the rest were written and fact-checked by the Quiz Zoomies team. Every round shuffles the questions, keeps your score and streak, and shows the right answer after each pick. Planet facts follow NASA's planetary fact sheets, rounded so they are easy to remember.
Prefer a printable list? See all the space trivia questions and answers.
10 sample questions with answers
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Which planet do we live on?
Show answer
Earth Easy question
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Which planet is 2nd from the Sun?
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Venus Easy question
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Which planet is closest to the Sun?
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Mercury Medium question
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Which planet is 5th from the Sun?
Show answer
Jupiter Medium question
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Which is the smallest planet in our solar system?
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Mercury Medium question
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How many moons does Mars have?
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2 Hard question
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About how long is one year on Venus?
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About 225 Earth days Hard question
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About how long is one year on Neptune?
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About 165 Earth years Hard question
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Which planet does the moon Triton orbit?
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Neptune Hard question
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Which planet is less dense than water?
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Saturn Impossible question
Frequently asked questions
How many questions are in the planets quiz?
49 questions: 8 easy, 13 medium, 22 hard, and 6 impossible. Each round picks 10, 25 or 50 of them at random, so every game is different, and the All 49 button plays the full set.
What is the order of the planets from the Sun?
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Mercury is closest to the Sun and Neptune is farthest.
Is Pluto a planet?
No. Pluto was reclassified as a dwarf planet in 2006, so our solar system has eight planets.
Which is the largest planet?
Jupiter. It is so big that all the other planets could fit inside it.
How do you play the planets quiz?
Pick a round size and press Start. Choose one of the four answers (or press 1 to 4 on a keyboard), see the right answer, then go to the next question. At the end you get your score, your best streak and a list of the questions you missed, plus a button to share your score.
Is the quiz free and safe for kids?
Yes. It is free with no sign-up, nothing you answer leaves your browser, and every question is family-friendly.
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