1. Practice Quiz

2. 1. Dark regions on the moon that are impact basins which have been filled in by lava are called ___________.

3. maria

4. 2. A ________ is a trench-like valley or winding ditch on the moon’s surface, through which lava once flowed.

5. rille

6. 3. The eruption of molten rock from the interior of a planet onto its surface is called _________.

7. volcanism

8. 4. The process by which gravity separates materials according to density is _______.

9. differentiation

10. 5. The geological process where plates are moved around by convection currents in the mantle is called _______

11. Plate tectonics

12. _____________ causes surface changes caused due to wind, water or ice.

13. Erosion

14. 7. ___________ was an important process that occurred during volcanism which helped form a planet’s atmosphere.

15. Outgassing

16. 8. The primary method by which a planet’s interior heats today is by _________________.

17. Radioactive decay

18. 9. Long cliffs called ____________ were formed on Mercury’s surface when its interior shrank.

19. scarps

20. 10. Which geologic processes have shaped the surface of Mars?

21. Erosion, impact cratering, tectonics and volcanism

22. 11. Which process is taking place at the site labeled A?

23. Seafloor spreading

24. 12. _________________ bombardment created the fine soil on the moon called _______________.

25. Micrometeorite, regolith