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46. Impurities (such as Pyrite or Clay mineral) in the coal create ______________  

36. Which “age” does put the events in an order from oldest to youngest in establishing the sequence of events?  

29. Which of the following does NOT explain whether or not volcanoes erupt violently?  

30. Subduction zones magmas produce most violent eruptions because ____________  

29. Which of the following below is NOT a type of metamorphism?  

50. Cross-beds form by the movement of sediment dunes and ripples by wind or water.

41.Dissolution, Hydrolysis and ________________are chemical weatherings  

8. When magma has less water (gases) and less silica (basaltic), it will create Pyroclasts.

44. It takes place between the sedimentary rocks and bedding surface is IRREGULAR that is indicating EROSION; therefore, which of the following is true?  

4. Mixtures of minerals melt at lower temperatures