This quiz works best with JavaScript enabled. Home > Science > Physics > Solar System – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Solar System Quiz 20 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is one fact about Mercury? A) It has 2 irregularly shaped moons. B) It doesn't have enough gravity to keep an atmosphere. C) It is the least dense of the planets. D) It is made mostly of gas. Show Answer Correct Answer: B) It doesn't have enough gravity to keep an atmosphere. 2. All the objects in the space like planets, the sun, the moon and the stars are A) Solar family. B) Celestial bodies. C) Satellites. D) Solar systems. Show Answer Correct Answer: B) Celestial bodies. 3. Why was Pluto demoted to a dwarf planet? A) It does not have enough gravity to be spherical. B) It does not orbit the sun. C) It has other objects in its area of orbit. D) It is smaller than Eris. Show Answer Correct Answer: C) It has other objects in its area of orbit. 4. One astronomical unit equals ..... A) The average distance from Earth to the Sun. B) The amount of time it takes Earth to orbit the Sun. C) The distance to the nearest star. D) The amount of time it takes light to travel from the Sun to Earth. Show Answer Correct Answer: A) The average distance from Earth to the Sun. 5. The gravity on this planet is 6 times stronger than Earth's gravity A) Jupiter. B) Saturn. C) The sun. D) Neptune. Show Answer Correct Answer: A) Jupiter. 6. Which are the four gaseous planets? A) Jupiter, Saturn, Uranus, Neptune. B) Jupiter, Saturn, Uranus, Pluto. C) Mercury, Venus, Earth, Mars. D) Ethan, Arik, Ashar, Jovan. Show Answer Correct Answer: A) Jupiter, Saturn, Uranus, Neptune. 7. The sun and all the planets and other bodies that revolve around it make up the A) Universe. B) Galaxy. C) Solar system. D) Neighborhood. Show Answer Correct Answer: C) Solar system. 8. The United States has landed a device on Mars. Using this device, which question can now be answered that could not be answered before? A) What is the soil like on Mars?. B) What shape and color is Mars?. C) How far away is Mars?. D) Does Mars have any moons?. Show Answer Correct Answer: A) What is the soil like on Mars?. 9. What is one fact about Uranus? A) It appears to be on its side because its axis is so tilted. B) It is the hottest of the planets. C) It has the largest and most complex ring system. D) It has dust storms that can last for months. Show Answer Correct Answer: A) It appears to be on its side because its axis is so tilted. 10. Large clump of ice, dust, and small rock particles that has a tail and orbits the sun on a long path A) Asteroids. B) Meteor. C) Comet. D) Planet. Show Answer Correct Answer: C) Comet. 11. What model of the solar system states the sun is the center A) Geocentric Model. B) Heliocentric model. C) Biocentric modal. D) Hydrocentric model. Show Answer Correct Answer: B) Heliocentric model. 12. Is the most distance planet from the sun. Know as an ice giant, has rings, and 13 moons. A) Jupiter. B) Saturn. C) Uranus. D) Neptune. Show Answer Correct Answer: D) Neptune. 13. The planet we live on is ..... A) Mars. B) Venus. C) Earth. D) Pluto. Show Answer Correct Answer: C) Earth. 14. What are the inner planets made of? A) Rock. B) Ice. C) Gas. D) Ammonia. Show Answer Correct Answer: A) Rock. 15. What caused the nebula to take on a disk shape? A) The cloud was shrinking. B) The cloud was heating up. C) The cloud was spinning. D) None of above. Show Answer Correct Answer: C) The cloud was spinning. 16. I am the sixth planet from the Sun. My nickname is 'The Ringed Planet'. A) Uranus. B) Saturn. C) Jupiter. D) Neptune. Show Answer Correct Answer: B) Saturn. 17. Earth's distance from the Sun ranges by approximately how much? A) 1 million km. B) 2 million km. C) 5 million km. D) 7 million km. Show Answer Correct Answer: C) 5 million km. 18. What is the solar system? A) The sun. B) The planets. C) The sun and planets ONLY. D) The sun, planets, and all other objects that orbit the sun. Show Answer Correct Answer: D) The sun, planets, and all other objects that orbit the sun. 19. Which planet in our solar system is closest to the Sun? A) Earth. B) Jupiter. C) Mercury. D) Saturn. Show Answer Correct Answer: C) Mercury. 20. Which planet is the only planet to spin on its side? A) Earth. B) Neptune. C) Jupiter. D) Uranus. Show Answer Correct Answer: D) Uranus. ← PreviousNext →Related QuizzesScience QuizzesSolar System Quiz 1Solar System Quiz 2Solar System Quiz 3Solar System Quiz 4Solar System Quiz 5Solar System Quiz 6Solar System Quiz 7Solar System Quiz 8Solar System Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books