Unraveling Earth's Magnetic Field
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Questions and Answers

Earth's magnetic field is primarily caused by:

  • Magnetized minerals within the rocks of oceanic and continental crust
  • Currents passing through wires in Earth's interior
  • Primordial magnetism that remains some 4.6 billion years after the planet was formed
  • The flow of an electrically conducting fluid in Earth's outer core (correct)
  • What is the age of the primordial magnetism that contributes to Earth's magnetic field?

  • 1 billion years
  • 10,000 years
  • 4.6 billion years (correct)
  • 100 million years
  • Which of the following is not a cause of Earth's magnetic field?

  • Magnetized minerals within the rocks of oceanic and continental crust
  • Currents passing through wires in Earth's interior (correct)
  • Primordial magnetism that remains some 4.6 billion years after the planet was formed
  • The flow of an electrically conducting fluid in Earth's outer core
  • According to Hess' 'geopoetry', which of the following does it NOT account for?

    <p>Passive continental margins - where no activity (crust addition/consumption) is taking place</p> Signup and view all the answers

    What is NOT considered in Hess' 'geopoetry'?

    <p>The formation of passive continental margins</p> Signup and view all the answers

    Which of the following is NOT accounted for in Hess' 'geopoetry'?

    <p>The formation of passive continental margins</p> Signup and view all the answers

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