Earth Science 9 2
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Earth Science 9 2

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Earth Science 9 2 Earth Science 9 2 Presentation Transcript

  • Plate Tectonics 9.2
  • Plate Tectonics
    The theory that proposes that Earth’s outer shell consists of individual plates that interact in various ways and thereby produce earthquakes, volcanoes, mountains, and the crust itself.
  • Plate
    One of numerous rigid sections of the lithosphere that moves as a unit over the material of the asthenosphere.
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  • Divergent Boundary
    A region where the rigid plates are moving apart, typified by the oceanic ridges.
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  • Covergent Boundary
    A boundary in which two plates moves together.
  • Transform Fault Boundary
    A boundary in which two plates slide past each other without creating or destroying lithosphere.
  • Key Concept
    What is the theory of plate tectonics?
    According to the theory of plate tectonics, the uppermost mantle, along with the overlaying crust, behaves as a strong, rigid layer. This layer is known as the lithosphere.
  • Key Concept
    What are lithospheric plates?
    They are plates within the lithosphere that are continually moving and changes shape/size.
  • Key Concept
    What are the three types of plate boundaries?
    The three types of boundaries are convergent, divergent, and transform fault boundaries.