Plate Tectonics

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  1. A "plate" as used in the theory of Plate Tectonics is a _____ of the lithosphere.
  2. According to the theory of plate tectonics, plates constantly _____ relative to each other.
  3. Plates move beacuse they _____ on the moving _____.
    float, asthenosphere
  4. The two types of plate are _____ and _____.
    continental, oceanic
  5. Plate motion was first observed in _____ drift.
  6. We can prove that continents drift by showng that they _____ like pieces of a jigsaw puzzle, and by showing that _____, _____, _____ match when the continents are fitted to form a super continent.
    fit, fossil sites, rocks, climate zones
  7. Because oceans form by _____ motion of continents, ocean basins are _____ than continents.
    divergent, younger
  8. The _____ valley is a proof that the seafloor spreads.
  9. The age of the seafloor rocks _____ as the distance from the MOR increases.
  10. _____ indicate that the plates are moving even today.
  11. Plate tectonics is an important theory beacuse it explains the distribution of _____, _____, and _____.
    oceans, continents, earthquakes
  12. The three types of plate motions, therefore boundaries are _____, _____, and _____.
    divergent, convergent, transform
  13. Seafloor forms at _____boundaries, and is destroyed along _____ boundaries at _____.
    divergent, convergent, trenches
  14. Plates are conserved at _____ boundaries, a good example for this is the _____ fault.
    transform, San Andreas
  15. The energy for late motion comes from _____/
    internal heat
  16. If two oceanic converge, the _____, _____, _____ plate will undergo subduction.
    denser, cooler, older
  17. Plate motion is from _____ to _____ volcanoes that were produced by a stationary hotspot.
    young, old
  18. Marine magnetic anomalies are _____ about the MOR proving that oceanic plates form at and spread from _____.
    symmetric, MOR
  19. Along what features would you expect to find the deepest earthquakes?
    subduction zones
  20. What plate boundary would have only shallow earthquakes?
  21. What specific type of plate boundary would have a fold mountain range.
    continental - continental
  22. What specific type of plate boundary would have volcanic mountain ranges.
    continental - oceanic
  23. How would you recognize a series of volcanoes formed due to a hotspot?
    The volcanoes form a straight line
  24. What plate motion would "close" an ocean?
  25. How would you recognize a series of volcanoes formed due to subduction?
    The volcanoes form a curved line

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Plate Tectonics
2011-03-17 03:56:10
Plate Tectonics Munasinghe

Plate Tectonics
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