Volcano

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Across
  1. 2. The study of rocks
  2. 4. The outermost layer of the Earth
  3. 8. Light-colored volcanic rock rich in silica
  4. 11. Enormous chunks of rock floating atop the soft mantle
  5. 13. The substance created when molten rock cools
  6. 15. Hot substance found in a volcano
  7. 16. A huge waved cause by underwater earthquakes
  8. 19. A volcano in Indonesia
  9. 20. A scientist who studies rocks
  10. 21. When gas is cooled to a liquid state
  11. 27. An underground cavity filled with magma
  12. 29. A naturally occurring inorganic substance
  13. 31. Small fragments of lava
  14. 32. The process of liquid turning to gas
  15. 33. The ocean floor
  16. 36. A volcano that is not likely to erupt again
  17. 37. An era lasting hundreds of millions of years
  18. 39. A chemically pure substance composed of atoms of a single type
  19. 40. The study of fossils
  20. 41. The movement of the Earths continents
  21. 43. The period when dinosaurs flourished
  22. 45. Rocks compacted by pressure and heat from deep inside the Earth
  23. 47. The third planet from the sun
  24. 49. An area when one plate is pushed under another
  25. 52. The scale sound is measured with
  26. 53. scale The scale measuring the intensity of an earthquake
  27. 54. A crack caused when lava erupts
  28. 55. Most dangerous volcano
  29. 58. The angular distance east or west of the prime meridian
  30. 61. A space rock that enters Earths atmosphere
  31. 62. The valley between two faults
  32. 64. A vast body of water
Down
  1. 1. Half of a sphere
  2. 3. Very old
  3. 5. A state of matter where the molecules are spread widely
  4. 6. mountain that erupts
  5. 7. Solidified lava that is in tiny particles
  6. 9. The hot substance that runs down a volcano
  7. 10. A vent which volcanic gasses escape
  8. 12. Outer part of Earth consisting of the crust and upper mantle
  9. 14. The southern super-continent formed when Pangaea broke apart
  10. 17. The area of alignment between the north and south poles
  11. 18. The unit in which and earthquake is measured with
  12. 19. A unit of weight
  13. 22. The first main super-continent
  14. 23. Also a protective weapon
  15. 24. The scientist that studies fossils
  16. 25. The northern super-continent the formed when Pangaea broke
  17. 26. Also known as the water cycle
  18. 28. Light-colored, course grained igneous rock
  19. 30. tube A tube-like tunnel formed by flowing lava
  20. 34. What the continents sit on
  21. 35. A volcanic eruption on the side of a volcano
  22. 36. Imaginary circle around the earth
  23. 38. The angular distance north or south of the equator
  24. 42. An are in the Pacific Ocean with lots of volcanoes
  25. 44. A circular depression in the top of a volcano
  26. 46. Volcanic activity in which lava or gasses are released
  27. 48. The measurement of temperature
  28. 50. Smallest volcano
  29. 51. The study of oceans
  30. 56. The of the Earth between the crust and the molten core
  31. 57. A time when the the Earth was very cold
  32. 59. When a volcano that has not erupted for a while
  33. 60. The innermost layer of the Earth
  34. 63. Most common lava type in shield volcanoes