Solar System Online Test

1. What is the term for the gradual wearing away of the Earth's surface by natural processes such as wind, water, and ice?

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

3. Which moon of Uranus is unique for its extreme axial tilt, causing it to essentially orbit the planet on its side?

4. What is the name of the moon of Pluto discovered in 2011 and named after the three-headed dog that guards the entrance to the underworld in Greek mythology?

5. According to Kepler's first law of planetary motion, what shape do planetary orbits trace around the Sun?

6. What is the average surface temperature of Pluto?

7. What is the name of the largest meteorite ever found on Earth?

8. What is the Oort Cloud?

9. What geological feature on Mars is believed to be the largest volcano in the Solar System by volume and is named after the Roman god of war?

10. What is the name of the region in the Solar System where long-period comets originate, extending to the outermost reaches of the Sun's gravitational influence?

11. Which space probe conducted the first flyby of Saturn and provided detailed images of its rings and moons?

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

13. Which moon of Jupiter is known for its highly active surface geology, with extensive cryovolcanism and icy geysers?

14. What geological feature on Earth is formed by the bending or buckling of rock layers under compressional stress, leading to the uplift of mountain ranges?

15. Which layer of the Earth's interior is divided into the outer and inner layers?

16. Which space probe became the first human-made object to reach interstellar space?

17. Which dwarf planet is known for its reddish surface color, likely due to the presence of organic compounds?

18. Which moon of Jupiter is known for its smooth, icy surface with long cracks and streaks caused by tidal forces?

19. What is the primary cause of auroras on Earth?

20. Which mission is currently orbiting Mercury to study its surface and composition?

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

22. Which feature is the largest impact crater on Mercury?

23. What is the state of Mercury's atmosphere?

24. What is the name of the persistent high-pressure region in Jupiter's atmosphere that is characterized by its swirling anticyclonic storm?

25. What is the potential significance of recurring slope lineae (RSL) observed on Mars?

26. What is the primary component of Neptune's atmosphere?

27. Which spacecraft provided the first close-up images and data of Uranus and its moons?

28. What is the term for the process by which sediments are deposited in a new location?

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

30. What is the name of the phenomenon where tidal forces cause a celestial body to become elongated along the axis pointing toward the attracting body?