Planets – MCQs

1. Which is the closest planet to the Sun?

• Venus
• Mercury
• Earth
• Mars

2. Which planet is known as the “Red Planet”?

• Venus
• Mars
• Jupiter
• Saturn

3. What is the largest planet in our solar system?

• Earth
• Saturn
• Jupiter
• Neptune

4. Which planet has the most prominent ring system?

• Jupiter
• Saturn
• Uranus
• Neptune

5. How many planets are in our solar system?

• 7
• 8
• 9
• 10

6. Which planet rotates on its side (nearly 90° tilt)?

• Mars
• Uranus
• Venus
• Neptune

7. The Great Red Spot is a massive storm on:

• Saturn
• Jupiter
• Neptune
• Mars

8. Which planet has the highest surface temperature?

• Mercury
• Venus
• Mars
• Earth

9. Which planet is known for its blue color due to methane in its atmosphere?

• Saturn
• Jupiter
• Neptune
• Uranus

10. Which of these is NOT a gas giant?

• Jupiter
• Saturn
• Earth
• Neptune

11. Which planet has the longest day (rotation period)?

• Mercury
• Venus (243 Earth days)
• Mars
• Jupiter

12. The “dwarf planet” Pluto is located in which region?

• Asteroid Belt
• Kuiper Belt
• Oort Cloud
• Orion Arm

13. Which planet’s atmosphere is mostly carbon dioxide (96%)?

• Earth
• Mars
• Venus
• Jupiter

14. What causes Jupiter’s auroras?

• Solar flares
• Its powerful magnetic field
• Volcanic activity
• Tidal forces

15. Which planet has the most moons?

• Saturn
• Jupiter (95 confirmed)
• Uranus
• Neptune

16. How many Earths could fit inside Jupiter?

• 100
• 1,300
• 500
• 50

17. Which planet has the shortest year (orbital period)?

• Mars
• Mercury (88 Earth days)
• Venus
• Earth

18. Olympus Mons, the tallest volcano in the solar system, is on:

• Earth
• Venus
• Mars
• Io (moon of Jupiter)

19. Which planet has the most extreme seasons due to its axial tilt?

• Earth
• Uranus (98° tilt)
• Mars
• Saturn

20. The “ice giants” of our solar system are:

• Jupiter and Saturn
• Uranus and Neptune
• Mars and Venus
• Earth and Mercury