Back to quiz

6. what is more abundant 16O, 17O or 18O?

  • 16O (99.76%) 17O (0.024) 18O (0.20)
  • 17O (90%) 16O (9%) 18O (1%)
  • 18O (92.10)% 16O (7.76%) 17O (0.14%)

7. what percentage of oil are in offshore resources?

  • 50%
  • 30%
  • 29%
  • 90%

8. what are evaporites?

  • they form in wet environments
  • minerals that form when seawater evaporates
  • they form in volcanic conditions

9. where do phosphates occur?

  • in areas of high biological productivity
  • in areas of low biological productivity
  • in shallow marine environments

10. in some rivers there is high sediment deposition when it meets the ocean, why is that and what does that indicate?

  • high productivity due to a fast flow, it also is an indicator of oil
  • low productivity, it indicates pollution
  • fast flow environment it also indicates petrodollars

11. how much do pelagic sediments cover the sea floor?

  • 3/4
  • 1/4
  • 1/1

12. where do metal sulfids occur?

  • in the inner core
  • in areas of high hydrothermal activity eg. volcanoes, hydrothermal vents, MORs
  • in areas of moderate to high hydrothermal activity