What was the name of the fossil flora that grew on Pangaea during the late Paleozoic?
  • Hot spot
  • 2 centimeters per year
  • A divergent plate boundry
  • Glossopteris
The former, late Paleozoic supercontinent is known as __________.
  • 2 centimeters per year
  • Hot spot
  • Pangea
  • Glossopteris
Which of the following was never proposed as evidence supporting the existence of Pangaea?
  • Islands along the Mid-Atlantic Ridge with rocks dating back from 542 million to 2500 million years ago
  • Tillites (rocks formed by glaciers) in South Africa and South America
  • A zone in the upper mantle that deforms by plastic flowage
  • Shifting plates were caused by changes in the Moon's orbit.
What is the typical rate of seafloor spreading in the Atlantic Ocean?
  • 2 centimeters per year
  • A continental rift along parts of the African continent beginning to slowly separate
  • A divergent plate boundry
  • Glossopteris
What type of boundary occurs along the Aleutian Islands in the North Pacific?
  • A divergent plate boundry
  • A convergent boundary on a volcanic arc above the northward-subducting Pacific plate
  • A continental rift along parts of the African continent beginning to slowly separate
  • A rift zone that may eventually open into a major ocean if Arabia and Africa continue to seperate
What is the temperature that magnetite loses its magnetization?
  • 2 centimeters per year
  • At subduction zones along convergent plate boundaries
  • Glossopteris
  • 800 degrees C
Where in the ocean does oceanic lithosphere sink into the mantle?
  • At subduction zones along convergent plate boundaries
  • A zone in the upper mantle that deforms by plastic flowage
  • Shifting plates were caused by changes in the Moon's orbit.
  • 2 centimeters per year
Which of the following paleoclimatic evidence supports the idea of the late Paleozoic supercontinent in the Southern Hemisphere?
  • Tillites (rocks formed by glaciers) in South Africa and South America
  • Shifting plates were caused by changes in the Moon's orbit.
  • A zone in the upper mantle that deforms by plastic flowage
  • Islands along the Mid-Atlantic Ridge with rocks dating back from 542 million to 2500 million years ago
Which of the following is an example of an active continent-continent collision?
  • Shifting plates were caused by changes in the Moon's orbit.
  • The northward movement of India into Eurasiasee
  • Alfred Wegner
  • They are young, active volcanoes built on a continental margin above a sinking slab of oceanic lithosphere.
What type of region is the modern-day Red Sea?
  • A rift zone that may eventually open into a major ocean if Arabia and Africa continue to seperate
  • A continental rift along parts of the African continent beginning to slowly separate
  • A divergent plate boundry
  • A convergent boundary on a volcanic arc above the northward-subducting Pacific plate
What process is evident at oceanic trenches?
  • Shifting plates were caused by changes in the Moon's orbit.
  • A rift zone that may eventually open into a major ocean if Arabia and Africa continue to seperate
  • A continental rift along parts of the African continent beginning to slowly separate
  • Sinking of oceanic lithosphere into the mantle at a subduction zone
Which of the following properly describes Mount St. Helens and the other Cascade volcanoes?
  • They are young, active volcanoes built on a continental margin above a sinking slab of oceanic lithosphere.
  • Alfred Wegner
  • The northward movement of India into Eurasiasee
  • Islands along the Mid-Atlantic Ridge with rocks dating back from 542 million to 2500 million years ago
Which of the following statements applies to the asthenosphere, but not the lithosphere?
  • Earth's diameter has been essentially constant over time.
  • Shifting plates were caused by changes in the Moon's orbit.
  • A zone in the upper mantle that deforms by plastic flowage
  • Islands along the Mid-Atlantic Ridge with rocks dating back from 542 million to 2500 million years ago
What evidence did the Deep Sea Drilling Project find about the dates of rocks in the ocean basins?
  • Normal and reversed magnetized strips roughly parallel to the ridge
  • A convergent boundary on a volcanic arc above the northward-subducting Pacific plate
  • The ocean basins are relatively young; most ocean basin rocks and sediments are Cretaceous or younger in age.
  • Islands along the Mid-Atlantic Ridge with rocks dating back from 542 million to 2500 million years ago
A transform plate boundary is characterized by __________.
  • A deep, vertical fault along which two plates slide past one another in opposite directions
  • A continental rift along parts of the African continent beginning to slowly separate
  • A convergent boundary on a volcanic arc above the northward-subducting Pacific plate
  • A rift zone that may eventually open into a major ocean if Arabia and Africa continue to seperate
What type of plate boundary is usually associated with pull-apart rift zones?
  • A convergent boundary on a volcanic arc above the northward-subducting Pacific plate
  • 2 centimeters per year
  • A divergent plate boundry
  • A rift zone that may eventually open into a major ocean if Arabia and Africa continue to seperate
Which two scientists proved that a symmetrical magnetic pattern existed in seafloor basalts and related those stripes to spreading at a mid-oceanic ridge?
  • Vine and Matthews
  • Earth's diameter has been essentially constant over time.
  • A zone in the upper mantle that deforms by plastic flowage
  • Tillites (rocks formed by glaciers) in South Africa and South America
Which of the following is not evidence supporting the theory of plate tectonics?
  • Tillites (rocks formed by glaciers) in South Africa and South America
  • Shifting plates were caused by changes in the Moon's orbit.
  • Islands along the Mid-Atlantic Ridge with rocks dating back from 542 million to 2500 million years ago
  • A zone in the upper mantle that deforms by plastic flowage
Which scientist argued forcefully for continental drift in the early part of the 20th century?
  • Vine and Matthews
  • They are young, active volcanoes built on a continental margin above a sinking slab of oceanic lithosphere.
  • Alfred Wegner
  • Glossopteris
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