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Solar System

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Click here for the Answers to Solar System questions

1. Q: How many planets are there in the Solar System?

A: 7

B: 8

C: 9

D: 10

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2. Q: What planet is closest to the sun?

A: Mars

B: Mercury

C: Earth

D: Venus

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3. Q: What is the second planet from the sun?

A: Mercury

B: Earth

C: Mars

D: Venus

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4. Q: What is the third planet from the sun?

A: Earth

B: Mars

C: Jupiter

D: Venus

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5. Q: What is the fourth planet from the sun?

A: Earth

B: Mars

C: Venus

D: Jupiter

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6. Q: What is the fifth planet from the sun?

A: Saturn

B: Mars

C: Uranus

D: Jupiter

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7. Q: What is the seventh planet from the sun?

A: Jupiter

B: Uranus

C: Neptune

D: Pluto

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8. Q: What is the sixth planet from the sun?

A: Saturn

B: Mars

C: Jupiter

D: Pluto

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9. Q: What is the eighth planet from the sun?

A: Jupiter

B: Pluto

C: Uranus

D: Neptune

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10. Q: What is the farthest planet from the sun?

A: Pluto

B: Mars

C: Venus

D: Jupiter

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11. Q: Which planet is not a gas giant?

A: Neptune

B: Saturn

C: Mars

D: Jupiter

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12. Q: Which planet is not a terrestrial planet?

A: Saturn

B: Earth

C: Mars

D: Venus

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13. Q: What is the most volcanically active body in the solar system?

A: Mars

B: Io

C: Ganymede

D: Pluto

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14. Q: Which planet has the largest ring system?

A: Jupiter

B: Pluto

C: Mercury

D: Saturn

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15. Q: How much meteoritic material do scientists estamate falls on the Earth each day?

A: 1 pound

B: 1 ton

C: 10 tons

D: more than 1000 tons

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16. Q: Which is the densest planet?

A: Mars

B: Earth

C: Jupiter

D: Pluto

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17. Q: What is the largest terrestrial planet?

A: Mars

B: Mercury

C: Venus

D: Earth

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18. Q: What is the only known moon of Pluto?

A: Plutonia

B: Charon

C: Io

D: Ganymede

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19. Q: What is the Earth's radius?

A: 6378 Km

B: 1237 Km

C: 12400 Km

D: 25000 Km

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20. Q: What is the rotational period of Earth?

A: 1 year

B: 48 hours

C: 24 hours

D: 12 hours

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21. Q: Where is the main asteroid belt in the Solar System?

A: Just outside Pluto's orbit

B: Between Earth and Mars

C: Between Neptune and Saturn

D: Between Mars and Jupiter

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22. Q: What asteroid was the focus of the NEAR spacecraft?

A: Eros

B: Io

C: Gaspra

D: Ida

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23. Q: Where do most comets arrive from?

A: the asteroid belt

B: the Oort cloud

C: the Milky Way

D: Saturns rings

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24. Q: How long could a long-period comet take to orbit around the Sun?

A: 1000 years

B: 10000 years

C: 100000 years

D: 30 million years

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25. Q: What is the comet belt outside of Pluto's orbit called?

A: the Oort cloud

B: Kuiper Belt

C: Main asteroid Belt

D: Halley Belt

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26. Q: Which is shorter, Mercury's day or year?

A: day

B: year

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27. Q: Which planet has the hottest temperatures?

A: Mercury

B: Mars

C: Venus

D: Pluto

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28. Q: How long is Mercury's day?

A: 5 minutes

B: 10 Earth days

C: 176 Earth days

D: 3 Earth years

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29. Q: Which moon is a moon of Mars?

A: Phobos

B: Io

C: Ganymede

D: Charon

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30. Q: Which planet is Olympus Mons, the highest volcano in the Solar System, on?

A: Jupiter

B: Mars

C: Venus

D: Mercury

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31. Q: What is the largest planet in the Solar System?

A: Mars

B: Saturn

C: Neptune

D: Jupiter

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32. Q: How large is jupiter's mass when compared to the other planets in the Solar System?

A: twice as big as all the other planets combined

B: as big as all the other planets combined

C: three times as big as all the other planets combined

D: four times as big as all the other planets combined

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33. Q: What is the Great Red Spot and Jupiter?

A: A volcanic reaction that has lasted over 100 years

B: A storm that has lasted over 100 years

C: A storm that has lasted almost 10 years

D: A giant red lake

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34. Q: How many moons does Jupiter have?

A: 12

B: 14

C: 16

D: 18

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35. Q: Which planet has the most moons?

A: Jupiter

B: Mercury

C: Mars

D: Uranus

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36. Q: Which planet was the first planet located through mathematical predictions rather than through regular observations of the sky?

A: Neptune

B: Pluto

C: Uranus

D: Mercury

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37. Q: Which planet has the fastest winds, blowing at speeds of over 2,400 km (1500 miles) per hour?

A: Uranus

B: Neptune

C: Pluto

D: Saturn

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38. Q: What is the smallest planet?

A: Mercury

B: Earth

C: Pluto

D: Venus

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39. Q: How many years does it take Pluto to orbit around the sun?

A: 3

B: 15

C: 97

D: 248

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40. Q: Which is the coldest planet of the Solar System?

A: Pluto

B: Earth

C: Mars

D: Neptune

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Click here for the Answers to Solar System questions

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