Ch 3: Plate tectonics
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Questions and Answers

According to the theory of continental drift, what was the name of the single massive supercontinent that existed around 200 million years ago?

  • Megaearth
  • Pangaea (correct)
  • Gondwana
  • Laurasia
  • What evidence supports the theory of continental drift by indicating that the east coast of South America and the west coast of Africa were once connected?

  • Distribution of fossils
  • Similar rock formations (correct)
  • Coal deposits
  • Matching glacial deposits
  • What do matching glacial traces in Brazil and West Africa suggest about these regions?

  • They experienced similar conditions under a unified landmass (correct)
  • They shared similar rock formations
  • They had fossils of Lystrosaurus
  • They had coal deposits
  • Which reptile's fossils found across continents separated by oceans provide evidence for the theory of continental drift?

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

    What material divides the Earth's lithosphere into tectonic plates?

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

    Which theory proposed that continents drift apart due to tectonic forces?

    <p>Plate Tectonics theory</p> Signup and view all the answers

    What did Alfred Wegener propose in 1923 regarding the continents?

    <p>They once formed Pangaea</p> Signup and view all the answers

    'Jigsaw Fit' refers to the alignment between which two continents' coasts as supporting continental drift?

    <p><em>South America and Africa</em></p> Signup and view all the answers

    Which of the following is NOT a piece of evidence supporting continental drift?

    <p>Nuclear Fission</p> Signup and view all the answers

    Which group of continents were created when Pangaea fragmented into Laurasia and Gondwana?

    <p>Europe and Asia</p> Signup and view all the answers

    What type of plate margin is characterized by plates moving apart?

    <p>Constructive Margins</p> Signup and view all the answers

    In which type of plate margin does an oceanic plate subduct under a continental plate?

    <p>Destructive Margins</p> Signup and view all the answers

    At which type of plate margin do plates slide past each other without creating or destroying crust?

    <p>Conservative Margins</p> Signup and view all the answers

    What geological feature is formed when two continental plates collide?

    <p>Mountain ranges</p> Signup and view all the answers

    Which monitoring technique is used for earthquakes to measure rock tension?

    <p>Using tilt meters</p> Signup and view all the answers

    What is an indicator used to observe potential volcanic eruptions?

    <p>Measuring gas emissions</p> Signup and view all the answers

    Which type of margin can cause pressure build-up leading to severe earthquakes when the plates finally slip?

    <p>Conservative Margins</p> Signup and view all the answers

    What is a significant difference between destructive and constructive margins?

    <p>Oceanic plate subduction</p> Signup and view all the answers

    What geological concept was proposed by Alfred Wegener in 1923?

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

    Which evidence supporting continental drift is based on the close alignment of the east coast of South America and the west coast of Africa?

    <p>Jigsaw Fit</p> Signup and view all the answers

    What type of reptile's fossils found across continents separated by oceans provide evidence for the theory of continental drift?

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

    Which geological feature is used as evidence for continental drift due to similar rock formations and fossil evidence across continents?

    <p>Geology and Fossils</p> Signup and view all the answers

    What concept refers to the Earth's lithosphere being divided into tectonic plates that float over the semi-fluid asthenosphere?

    <p>Plate Tectonics</p> Signup and view all the answers

    Matching glacial traces in Brazil and West Africa suggest what about these regions?

    <p>They were once connected under a unified landmass.</p> Signup and view all the answers

    'Jigsaw Fit' evidence supports continental drift by aligning which two coasts closely at certain depths?

    <p>South America and Africa</p> Signup and view all the answers

    'Coal Deposits' are used as evidence for continental drift because coal is found in the same geological layers across which continents?

    <p>Antarctica, South America, India</p> Signup and view all the answers

    'Distribution of Fossils' evidence for continental drift implies that what type of reptile was found across continents now separated by oceans?

    <p>Non-swimming reptile</p> Signup and view all the answers

    'Geology and Fossils' are used as evidence for continental drift when similar rock formations and fossil evidence are found across which two continents?

    <p>Africa and South America</p> Signup and view all the answers

    What geological process is responsible for the movement of tectonic plates?

    <p>Convection currents in the mantle</p> Signup and view all the answers

    Which type of plate margin is characterized by the creation of new crust and mid-ocean ridges?

    <p>Constructive Margins</p> Signup and view all the answers

    What geological feature is formed when two continental plates collide?

    <p>Mountain Ranges</p> Signup and view all the answers

    Which event is likely to occur at a destructive plate boundary?

    <p>Subduction of an oceanic plate</p> Signup and view all the answers

    What is a common feature of conservative plate margins?

    <p>Plates sliding past each other</p> Signup and view all the answers

    Which monitoring technique is crucial for predicting volcanic eruptions?

    <p>Monitoring gas emissions and ground temperature</p> Signup and view all the answers

    What is a key indicator for potential earthquakes at a transform plate boundary?

    <p>Changes in coastal water levels</p> Signup and view all the answers

    What characteristic distinguishes collision margins from other types of plate boundaries?

    <p>Lack of crust creation or destruction</p> Signup and view all the answers

    What geological feature is created when an oceanic plate subducts beneath a continental plate?

    <p>Volcanic island arc</p> Signup and view all the answers

    Which reptile's fossils are found across continents now separated by oceans, providing evidence for continental drift?

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

    What is the geographic term for the two supercontinents formed after the fragmentation of Pangaea around 135 million years ago?

    <p>Laurasia and Gondwana</p> Signup and view all the answers

    Which type of plate boundary is associated with the creation of new crust and mid-ocean ridges?

    <p>Constructive margin</p> Signup and view all the answers

    What evidence for continental drift arises from the distribution of coal deposits across Antarctica, South America, India, Africa, and Australia?

    <p>Coal layers</p> Signup and view all the answers

    Which phenomenon occurs at a transformative plate boundary?

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

    What does the 'Jigsaw Fit' evidence support regarding continental drift?

    <p>Continental alignment</p> Signup and view all the answers

    What does the alignment of the east coast of South America and the west coast of Africa indicate?

    <p>'Jigsaw Fit' evidence</p> Signup and view all the answers

    Which type of plate margin is characterized by plates moving apart?

    <p>Constructive margin</p> Signup and view all the answers

    What did Alfred Wegener propose in 1923 regarding the continents?

    <p>They were drifting apart.</p> Signup and view all the answers

    What type of plate margin is exemplified by the formation of deep-sea trenches and volcanic island arcs?

    <p>Destructive Margins</p> Signup and view all the answers

    What geological activity is typically associated with collision margins?

    <p>Mountain range formation</p> Signup and view all the answers

    Which feature is NOT commonly associated with conservative plate margins?

    <p>Mid-ocean ridges</p> Signup and view all the answers

    What type of plate margin can trigger violent earthquakes and volcanic eruptions?

    <p>Destructive Margins</p> Signup and view all the answers

    Which monitoring method is specifically mentioned for observing potential volcanic eruptions?

    <p>Monitoring ground temperature and gas emissions</p> Signup and view all the answers

    What distinguishes collision margins from other types of plate boundaries?

    <p>Pushing material upward to form mountains</p> Signup and view all the answers

    At which type of plate margin do plates move apart, allowing magma to rise and solidify?

    <p>Constructive Margins</p> Signup and view all the answers

    What is a common feature of conservative plate margins?

    <p>Slide past each other without creating or destroying crust</p> Signup and view all the answers

    Which geological activity is typically associated with collision margins?

    <p>Pushing material upward to form mountain ranges</p> Signup and view all the answers

    What is a key indicator for potential earthquakes at a transform plate boundary?

    <p>Sticking plates causing pressure build-up</p> Signup and view all the answers

    Which event is likely to occur at a destructive plate boundary?

    <p>Trigger violent earthquakes and volcanic eruptions</p> Signup and view all the answers

    What does the 'Jigsaw Fit' evidence support regarding continental drift?

    <p>Close alignment of the east coast of South America and west coast of Africa</p> Signup and view all the answers

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