Explore the World Above
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Questions and Answers

What is the term used to describe the flat area off the coast of Florida?

  • Underwater volcano
  • Ridge
  • Continental shelf (correct)
  • Ocean trench
  • What causes the little bumps seen in the deep ocean on the elevation profile?

  • Underwater volcanism (correct)
  • Ocean currents
  • Sediment erosion
  • Plate tectonics
  • What is the term used to describe the underwater volcanoes created by subduction or hot spots?

  • Continental shelf
  • Ocean trench
  • Ridge
  • Seamounts (correct)
  • Which type of satellite imagery provides more detailed information about the sea floor?

    <p>Satellite imagery</p> Signup and view all the answers

    What causes slight disturbances on the surface of the ocean?

    <p>Sea mounts</p> Signup and view all the answers

    How do satellites measure the height of structures on the sea floor?

    <p>By detecting gravitational anomalies</p> Signup and view all the answers

    What type of boundary is represented by the deep blue lines on the map?

    <p>Convergent boundaries</p> Signup and view all the answers

    Which device allowed for a large-scale mapping of the ocean floor?

    <p>Multi-beam echo sounder</p> Signup and view all the answers

    What is the purpose of the deep scattering layer?

    <p>To reflect sound waves</p> Signup and view all the answers

    What technology helped confirm seafloor spreading?

    <p>Precision depth recorder</p> Signup and view all the answers

    What technology is used to measure the seafloor from space?

    <p>Mapping from space</p> Signup and view all the answers

    Which method is used to explore the Earth's crust using artificially generated waves?

    <p>Seismic reflection</p> Signup and view all the answers

    What is the purpose of seismic reflection?

    <p>To locate oil and gas reservoirs</p> Signup and view all the answers

    What are the three major provinces of the ocean?

    <p>Continental margins, deep ocean basins, and mid-ocean ridges</p> Signup and view all the answers

    What is a bathymetric profile?

    <p>A line drawn across the ocean to show the seafloor features</p> Signup and view all the answers

    What is bathymetry?

    <p>The measure of the distance from the top of the water to the bottom of the ocean.</p> Signup and view all the answers

    When was the first systematic measurement of the ocean conducted?

    <p>1872</p> Signup and view all the answers

    What did the early sea goers use to measure the sea floor?

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

    What did the early measurements of the ocean floor reveal?

    <p>The ocean floor had deep mountains.</p> Signup and view all the answers

    What type of boundary is represented by the mid-Atlantic ridge mentioned in the text?

    <p>Divergent plate boundary</p> Signup and view all the answers

    What are the linear cracks formed at transform boundaries called?

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

    What are the rounded structures formed by cooling magma on the seafloor called?

    <p>Pillow basalts</p> Signup and view all the answers

    What allows water in hydrothermal vents to reach temperatures higher than boiling?

    <p>Intense pressure</p> Signup and view all the answers

    What are the two types of continental margins?

    <p>Active and passive</p> Signup and view all the answers

    What is the continental shelf?

    <p>The first part of the continental margin</p> Signup and view all the answers

    What causes the formation of a deep ocean trench?

    <p>Subduction of oceanic crust under continental crust</p> Signup and view all the answers

    What is the distinguishing feature of an active continental margin?

    <p>Tectonic activity</p> Signup and view all the answers

    What is the continental shelf?

    <p>A flooded part of the continent</p> Signup and view all the answers

    What is the continental slope?

    <p>The area where the mountains meet the valley</p> Signup and view all the answers

    What are submarine canyons?

    <p>Narrow and V-shaped canyons</p> Signup and view all the answers

    Where are the oldest seafloor typically found?

    <p>On the continental shelf</p> Signup and view all the answers

    What causes turbidity currents?

    <p>Underwater landslides</p> Signup and view all the answers

    What is the characteristic feature of turbidity currents?

    <p>They are supported by water</p> Signup and view all the answers

    What is the term used to describe the sediment deposit caused by turbidity currents?

    <p>Turbidite deposit</p> Signup and view all the answers

    What is the characteristic of suspension settling in the abyssal plains?

    <p>Particles settle out slowly</p> Signup and view all the answers

    What is the name for underwater mountains that have poked through the sea floor?

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

    What is the term used to describe flat areas on the sea floor that were once above the surface of the water?

    <p>Table mounts</p> Signup and view all the answers

    What is the name for the deepest part of the ocean?

    <p>Mariana trench</p> Signup and view all the answers

    What is the name for the longest mountain chain on the planet?

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

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