Mineral Resources in the Ocean
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Mineral Resources in the Ocean

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@CherishedVerse

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Questions and Answers

What is the main reason why gold extraction from ocean water is impractical?

  • The concentration of gold in ocean water is extremely small.
  • There are legal restrictions on extracting gold from ocean water.
  • The technology for extracting gold from seawater is not advanced.
  • The cost of extracting gold from seawater is high. (correct)

    • In terms of gold content, where is the largest known reserve found?

  • In rivers and lakes
  • In iron-manganese nodules on the ocean floor (correct)
  • In deep-sea vents
  • In continental ore deposits

    • Why is mining iron-manganese nodules from the deep ocean floor challenging?

  • Iron-manganese nodules are radioactive.
  • Sediment stirred up during mining can harm the ocean environment. (correct)
  • The techniques for extraction are not developed yet.
  • The nodules are too small to extract efficiently.

    • What is a major obstacle to extracting minerals from the open oceans?

    <p>The harmful impact of mining activities on the ocean environment</p> Signup and view all the answers

    Which ocean contains many areas covered with iron-manganese nodules?

    <p>Pacific Ocean</p> Signup and view all the answers

    What is the term used to describe areas in the United States with a complex pattern of rock types?

    <p>Orogenic belts</p> Signup and view all the answers

    What is the primary reason why most rocks do not contain economically valuable minerals?

    <p>They lack the necessary minerals</p> Signup and view all the answers

    Why do large areas with only one or a few colors on the geologic map of the United States represent sedimentary rocks?

    <p>A blanket of sedimentary rocks covers deeper rocks in Earth's crust</p> Signup and view all the answers

    What geological term refers to the word 'mountain-building'?

    <p>Orogenic</p> Signup and view all the answers

    Why do metal mining operations take up much less than 0.1 percent of the total land area in the United States?

    <p>Ores are formed only in specific conditions</p> Signup and view all the answers

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