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12. Hydrothermal ores form when ———————comes into contact with magma  

6. Which of the following is NOT a way to help melting of magma?  

7. Which of the volcano will have the most violent eruption and explain WHY, in terms of viscosity and gas content of the magma? (Hint viscosity is controlled by silica content)

23. Dark sedimentary rock layers indicate__________________  

27. In a trangressive rock sequence ——————————-  

44. Fill in the blanks  a-Coarse Grained texture (in Latin)__________________ (example=_____________)  b-Fine Grained texture (in Latin)    __________________ (example=_____________)

50. According to Vulcanist Theory (James Hutton1726-1797) rocks formed from___________  

7. What is Scientific Method?  

18. Geologically minerals are ____________________  

2. Why do we study earth?