Solar System Online Test

1. Which planet in the Solar System has a thick atmosphere composed mainly of carbon dioxide, with surface pressures about 92 times that of Earth?

2. Which spacecraft was the first to successfully land humans on the Moon?

3. What is the name of Kepler's second law of planetary motion?

4. Which of the following is NOT a type of rock formed by the process of weathering and erosion?

5. What is the phenomenon called when the solar wind compresses Earth's magnetosphere on the side facing the Sun?

6. Which spacecraft conducted a flyby of Pluto and explored the Kuiper Belt object Arrokoth?

7. What is the term for the phase of the Moon when only a small portion of its surface is illuminated, appearing as a thin crescent?

8. What phenomenon on Venus is characterized by a slow retrograde rotation, meaning it rotates in the opposite direction of most planets in the Solar System?

9. Which space probe carried a golden record containing sounds and images of Earth, intended as a message to potential extraterrestrial civilizations?

10. Which moon of Saturn is the only moon in the Solar System known to have a dense atmosphere, primarily composed of nitrogen?

11. Which gas is present in Pluto's thin atmosphere?

12. What is the approximate length of one day on Venus (one complete rotation)?

13. Which layer of the Earth's atmosphere contains the ozone layer?

14. Which dwarf planet is notable for its elongated shape and rapid rotation?

15. What is the term for the movement of water from the Earth's surface into the atmosphere through evaporation from bodies of water and transpiration from plants?

16. Which moon of Saturn is known for its active geysers erupting from its south pole, indicating the presence of a subsurface ocean?

17. What is the primary component of Ceres's surface?

18. What is the name of the group of four large moons of Jupiter discovered by Galileo?

19. What is the name of the moon of Pluto discovered in 2005 and named after the ferryman of the underworld in Greek mythology?

20. What is the name of the largest moon of Neptune?

21. Which comet is known for its bright appearance and greenish coma due to the presence of cyanogen and diatomic carbon?

22. Which Apollo mission was the last to land humans on the Moon's surface?

23. Which moon of Neptune is the largest and seventh-largest moon in the solar system?

24. What is unique about Triton's orbit around Neptune?

25. What is the name of the giant storm system observed on Neptune?

26. Which canyon system on Mars is the largest in the solar system?

27. What characteristic makes Mercury unique among the terrestrial planets?

28. Which moon of Saturn is thought to have subsurface oceans beneath its icy crust, similar to Europa and Enceladus?

29. What is unique about Uranus's rotation axis compared to other planets in the Solar System?

30. Which moon of Jupiter is the most heavily cratered body in the Solar System, indicating its ancient surface?