Planets General Knowledge MCQs Score: 0 Attempted: 0/20 1. : How many planets are in our Solar System? (A) 7 (B) 8 (C) 9 (D) 10 2. : Which is the largest planet in our Solar System? (A) Earth (B) Saturn (C) Jupiter (D) Neptune 3. : Which planet is known as the “Red Planet”? (A) Venus (B) Mars (C) Mercury (D) Uranus 4. : Which planet is closest to the Sun? (A) Mercury (B) Venus (C) Earth (D) Mars 5. : Which planet has the most rings? (A) Jupiter (B) Uranus (C) Neptune (D) Saturn 6. : Which planet is known as Earth’s “twin” due to its similar size? (A) Mars (B) Venus (C) Neptune (D) Mercury 7. : What is the smallest planet in the Solar System? (A) Mars (B) Pluto (C) Mercury (D) Venus 8. : Which planet has the strongest winds in the Solar System? (A) Saturn (B) Jupiter (C) Neptune (D) Venus 9. : Which planet has a day longer than its year? (A) Mars (B) Venus (C) Jupiter (D) Saturn 10. : What is the only planet known to support life? (A) Mars (B) Earth (C) Venus (D) Neptune 11. : Which planet is famous for its Great Red Spot, a giant storm? (A) Saturn (B) Jupiter (C) Neptune (D) Uranus 12. : What is the coldest planet in the Solar System? (A) Neptune (B) Uranus (C) Pluto (D) Mars 13. : Which planet is tilted on its side, rotating almost horizontally? (A) Saturn (B) Uranus (C) Neptune (D) Mars 14. : What is the hottest planet in the Solar System? (A) Mercury (B) Venus (C) Mars (D) Jupiter 15. : Which planet has the most moons? (A) Jupiter (B) Saturn (C) Uranus (D) Neptune 16. : What is the name of Marsβ two moons? (A) Titan and Europa (B) Deimos and Phobos (C) Ganymede and Callisto (D) Triton and Io 17. : What is the name of the largest moon in the Solar System? (A) Titan (B) Ganymede (C) Europa (D) Callisto 18. : Which planet has the shortest day (fastest rotation)? (A) Mercury (B) Jupiter (C) Neptune (D) Saturn 19. : Which planet has a hexagonal-shaped storm at its north pole? (A) Jupiter (B) Neptune (C) Saturn (D) Uranus 20. : Which planet was downgraded to a “dwarf planet” in 2006? (A) Neptune (B) Pluto (C) Ceres (D) Eris