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

14. Which of the following is NOT a type of weathering?

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)

24. Mud cracks indicate ————————–  

38. Which of the igneous rock below formed from sticky, plastic and squashed hot ash and lapilli mixture?    

18. Which of the following most likely will NOT help geologists in finding oil?  

5. Which of the following mineral below does melt the last (requires high temp to melt)?  

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

36. Halite and Gypsum minerals are also known as________________  

24. Nuclei of the atoms consists of electrons and protons