Comparative Planetology — MCQs

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1. What does comparative planetology study?





2. Which two planets are often called “twin planets” because of their similar size and mass?





3. Which planet has the most similar length of day to Earth?





4. Which planet rotates in the opposite direction compared to most others?





5. Which planet has the largest volcano in the solar system?





6. The Great Red Spot is a giant storm on which planet?





7. Which planet has the fastest rotation period?





8. Which planet has the highest surface temperature?





9. Which two planets are known as the “ice giants”?





10. Which terrestrial planet has no atmosphere?





11. Saturn’s rings are mostly made of:





12. Which planet has the strongest magnetic field?





13. Which planet’s axis tilt is about 98 degrees, causing extreme seasons?





14. Which planet is known for having the largest number of moons?





15. The planet with the most eccentric orbit is:





16. Which gas dominates the atmosphere of Venus?





17. The surface of which planet shows evidence of dried river valleys and ancient water flow?





18. Which giant planet is least dense and could float in water?





19. Which planet has the fastest winds in the solar system?





20. Which planet has the longest day (slowest rotation)?





21. Which planet has the largest canyon system, Valles Marineris?





22. The asteroid belt lies between:





23. Which terrestrial planet has the thickest atmosphere?





24. Which planet is known as the “morning star” and “evening star”?





25. Which planet’s day length is almost equal to its year?





26. Which planet has a hexagon-shaped storm at its north pole?





27. Which planet’s density is closest to Earth’s?





28. Which two planets are known for their blue color due to methane in the atmosphere?





29. Which gas dominates the atmosphere of Jupiter?





30. The planet with the highest surface gravity is:





31. The “snow line” in comparative planetology refers to the distance where:





32. Which planet shows the greatest difference between day and night temperatures?





33. Which planet has a day length of about 10 hours?





34. The largest moon in the solar system is:





35. Titan, Saturn’s largest moon, has thick clouds made mostly of:





36. Which planet’s surface pressure is about 90 times greater than Earth’s?





37. Which planet has the largest tilt variation due to lack of a large stabilizing moon?





38. Which planet has a faint ring system discovered by Voyager?





39. Which planet has a magnetic field that is tilted and off-center?





40. Earth’s magnetic field is generated by:





41. Which planet’s core is believed to be shrinking, causing surface wrinkles?





42. Which moon has geysers that eject water into space?





43. Which Jovian moon is the most volcanically active body in the solar system?





44. Which planet’s magnetic field helps protect Earth-like life?





45. The greenhouse effect is strongest on which planet?





46. Which Jovian planet radiates more energy than it receives from the Sun due to gravitational contraction?





47. Which planet has the most tilted magnetic field?





48. Which Jovian planet appears featureless because of its bland atmosphere?





49. Which terrestrial planet shows the least geological activity today?





50. Comparative planetology helps us understand:





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