Plate Tectonics Stories
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Plate Tectonics Stories

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Questions and Answers

What is plate tectonics?

  • The theory that the earth's crust is broken up into plates (correct)
  • The theory that the moon's surface is broken up into plates
  • The theory that the earth's core is made of gold
  • The theory that the earth's crust is a single solid piece
  • Which project was designed to analyze the ocean floor in the 1960s?

  • Deep Space Exploration Project (DSEP)
  • Deep Sea Drilling Project (DSDP) (correct)
  • Oceanic Exploration Initiative (OEI)
  • Oceanic Core Drilling Program (OCDP)
  • What was the name of the ship that participated in the Deep Sea Drilling Project?

  • Poseidon's Trident
  • Glomar Challenger (correct)
  • Titanic II
  • Glomar Explorer
  • Which underwater mountain range runs from Iceland to Antarctica?

    <p>Mid-Atlantic Ridge</p> Signup and view all the answers

    What was the main task of the Deep Sea Drilling Project?

    <p>Drill into the ocean floor and extract samples</p> Signup and view all the answers

    How do tectonic plates move?

    <p>Slide past each other, push together, or pull apart</p> Signup and view all the answers

    Which ocean drilling project contributed to uncovering evidence in support of plate tectonics?

    <p>Deep Sea Drilling Project (DSDP)</p> Signup and view all the answers

    What was the initial theory about the formation of the oceanic ridge system?

    <p>Seafloor spreading</p> Signup and view all the answers

    Why were some scientists initially skeptical about the idea of the Mid-Atlantic Ridge being a tectonic plate boundary?

    <p>They found it hard to believe that magma could ooze up through a crack in the Earth's crust.</p> Signup and view all the answers

    What did the samples taken from the ridge system show regarding the age of rocks as you move away from the crest?

    <p>The rocks got older.</p> Signup and view all the answers

    Why was the thickness of sediment found near the ridge crest significantly different from that found at farther distances?

    <p>As a result of time for sediment to accumulate</p> Signup and view all the answers

    What did the samples taken from the ridge system disprove?

    <p>The theory of subduction zones</p> Signup and view all the answers

    How did the discovery of thin sediment layers near the ridge crest support the seafloor spreading theory?

    <p>It indicated new oceanic crust formation along a plate boundary.</p> Signup and view all the answers

    What is the main idea behind plate tectonics theory?

    <p>The earth's crust is broken up into plates</p> Signup and view all the answers

    How do tectonic plates interact with each other?

    <p>Pull apart, push together, or slide past each other</p> Signup and view all the answers

    What was the purpose of the Deep Sea Drilling Project (DSDP)?

    <p>To collect samples of ocean sediments and crust from the sea floor</p> Signup and view all the answers

    Where is the Mid-Atlantic Ridge located?

    <p>From Iceland to Antarctica</p> Signup and view all the answers

    Which ship was used in the Deep Sea Drilling Project for collecting samples from the ocean floor?

    <p>Glomar Challenger</p> Signup and view all the answers

    Why was the 1960s significant in the context of ocean exploration?

    <p>It marked the beginning of the Deep Sea Drilling Project (DSDP)</p> Signup and view all the answers

    How was the evidence supporting plate tectonics theory uncovered?

    <p>'Deep Sea Drilling Project' extracted samples from the ocean floor</p> Signup and view all the answers

    What was the significance of drilling the underwater ridge system mentioned in the text?

    <p>To investigate the formation of new oceanic crust and support a scientific theory</p> Signup and view all the answers

    Why were some scientists initially doubtful about the concept of seafloor spreading at the underwater ridge?

    <p>They believed that oceanic crust was not formed by magma upwelling.</p> Signup and view all the answers

    What did the samples taken from the ridge system reveal about the rocks as you move away from the crest?

    <p>The rocks got older farther from the crest.</p> Signup and view all the answers

    Why did scientists observe thin layers of sediment near the ridge crest and thicker layers as they moved away?

    <p>Due to tectonic plate movement causing sediment deposition</p> Signup and view all the answers

    What did the discovery of increased sediment thickness in samples away from the ridge suggest about those areas?

    <p>Those areas had been there for a longer period and had time for sediment accumulation.</p> Signup and view all the answers

    How did the evidence from drilling in the underwater ridge support the theory of seafloor spreading?

    <p>By demonstrating that new oceanic crust was being formed at plate boundaries and spreading out laterally</p> Signup and view all the answers

    What aspect of tectonic plate movement was particularly perplexing to scientists regarding the Mid-Atlantic Ridge?

    <p>The upwelling of magma through diverging plates</p> Signup and view all the answers

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