Geology Quiz 1 Review

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Across
  1. 3. Oceanic and Continental crust differ in their amounts of this element
  2. 6. These fit together, provide evidence for Continental Drift
  3. 8. Heating or cooling water changes its volume, and therefore _____
  4. 9. The core of the Earth is made up of heavier elements, due to density, such as nickel and this element
  5. 12. Type of current that is influenced by heat and controls sea floor spreading
  6. 13. The top physical layer of the Earth
  7. 15. “The heat source”
  8. 16. Other words for “divergent plate boundary”
  9. 17. The type of water that is very buoyant, hot, and looks like thick black smoke
  10. 20. To of the most documented mid-ocean ridges include the Mid-Atlantic Ridge and the ____ _____ Rise.
  11. 22. The _____ of the mid-ocean ridge is 2,500 meters deep
  12. 23. The organisms that live in the volcano and vent areas can withstand ________s of 200-300 atmosphere, pitch darkness, and frequent volcanic eruptions and ear quakes
  13. 25. _______ and remotely operated vehicles that have been used to explore the mid-ocean ridge have given information on less than 0.1% of it
  14. 26. Wegener found fossils from this semi aquatic organism in two different locations on the globe
  15. 28. The country of China, as well as in Russia, Antarctica, and parts of the United States today produce amounts of this material, which is only produced in tropical areas
  16. 29. The second physical layer of the Earth
Down
  1. 1. Not Iceland, the other extreme of the ridge
  2. 2. The food chains near the volcanos and vents often rely on ____ instead of photosynthesis
  3. 4. Relative type of rock that can be found near a mid-ocean rift
  4. 5. “All Earth”
  5. 7. Alfred Wegener’s theory of Continental Drift was backed up by climatic evidence, geologic evidence, and ____ evidence
  6. 10. The term “geological evidence” can refer to…
  7. 11. The main elements emitted by “black smoker” vents include mainly zinc, iron-sulfides, and ______
  8. 14. Other than volcanos, mid-ocean ridges often experience these.
  9. 15. Relative type of rock that can be found farther from a mid-ocean rift
  10. 17. Other scientists questioned Wegener’s theory based on the question:
  11. 18. Mid-ocean ridges create new areas of the _____
  12. 19. A 1783 eruption of an above sea-level volcano in the mid-ocean ridge killed a quarter of this country’s population
  13. 21. Volcanic eruptions in the ridge often produce this material
  14. 24. ______ maps of the ocean floor did not exist until recently
  15. 26. Woman who made breakthrough discoveries about the Mid-Atlantic Ridge
  16. 27. _____ spread apart at a rate of 1cm-20cm each year