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Take This Problem With a Grain of Salt

The world's oceans (97.2% of all the earth's water) contain enough salt to cover all of the continents with a layer of salt that is?

  • 0.00015 meters thick
  • 0.0015 meters thick
  • 0.015 meters thick
  • 0.15 meters thick
  • 1.5 meters thick
  • 15 meters thick
  • 150 meters thick
  • 1,500 meters thick
  • 15,000 meters thick
Again, which of these options is correct?

Note: Have students take on this project, as a neat surprise is in store.

Source: Mind-Bogglers, Lagoon Books, 1996