Exploring Earth's Geological Mysteries
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Exploring Earth's Geological Mysteries

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@DelectableGamelan

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Questions and Answers

What is the main focus of the text?

  • The exploration of the world beneath the ocean waves
  • The geological mysteries left behind by the earth's crust
  • The discovery of the marianas trench (correct)
  • The impact of glaciers on the earth's crust

    • When was the marianas trench first explored?

  • In the early 1900s
  • During the Challenger expedition in 1872 (correct)
  • During the 1940s
  • In 1951

    • What technology emerged 75 years after the discovery of the marianas trench?

  • Underwater drones
  • Submarine detection sonar (correct)
  • Satellite imaging
  • GPS mapping

    • How deep is the marianas trench?

    <p>7 miles</p> Signup and view all the answers

    What was used to measure the depth of the ocean floor during the Challenger expedition?

    <p>Lead weight and rope</p> Signup and view all the answers

    What did the Challenger expedition mark the birth of?

    <p>Modern oceanography</p> Signup and view all the answers

    Which technology did scientists realize they could use to build a remarkably accurate picture of the world beneath the waves?

    <p>Sonar technology</p> Signup and view all the answers

    What did sonar technology originally aim to detect?

    <p>Submarines lurking in the deep</p> Signup and view all the answers

    How did scientists use sonar to chart the bottom of the sea?

    <p>'Ping' sounds bouncing off solid objects</p> Signup and view all the answers

    What was discovered at a depth of 4475 fathoms?

    <p>A five-mile deep hole</p> Signup and view all the answers

    What was used during early 1900s to detect submarines lurking in deep?

    <p>Sonar technology</p> Signup and view all the answers

    What was used to measure ocean floor depths in early days?

    <p>Ropes and lead weights</p> Signup and view all the answers

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