On The Move Again

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On The Move Again!

• Plate tectonics
• High School

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Teacher Page

• Content Earth SciencePlate Tectonics
• Grade Level High School
• Creator Dorothy Walk
• Curriculum Objective SC 5 Goals 1.10, 2.1,
  Earth Science III.A

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What are plates?

• Plate tectonic is a theory that the lithosphere
  is made of plates that move and interact with
  each other at their boundaries.
• There are two types of plates oceanic and
  continental
• The boundaries of the plates are the locations of
  many earthquakes and volcanoes.

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Current Plate Boundaries
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How do we know they move?

• Fossil evidence, rock types and climatic changes
  are evidence of plate tectonic
• The jig-saw like fit of some continents indicate
  movement. (South America and Africa)

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Are they still moving?

• Measurements indicate that the plates are still
  moving
• Earthquakes at plate boundaries are caused by
  plate motion
• Volcanoes are due to plate motion

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Evidence

• Some specific evidence
• Fossils (Mesosaurus) that are found on different
  continents
• Distinctive rock formation on two different
  continents
• Pangaea250 million years ago, all continents
  were welded together forming a super-continent

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Where are we going?

• Types of plate movement
• Convergenttwo plates moving together
• Pacific Plate and Philippine Plate
• Divergenttwo plates moving apart
• Mid-Atlantic Ridge
• Transform or Lateraltwo plates sliding past each
  other
• Southern California

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Will we ever get there?

• Using the information concerning plate tectonics
  and the map of the current plates, think about
  how the plates could move and what effect that
  would have on the biosphere.

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What if the year is 8804
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Write a letter

• You are a time traveler. You have just arrived
  at a future time on Earth and saw the current map
  of the continents. You are to write a letter to
  the president of the world explaining the
  difference between the land form of Earth of your
  time (2004) and their time (a few million years
  in the future). Include what happened, why it
  happened and what will continue to happen. Be
  sure to include evidence of past plate movement.
  

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Current Plate Boundaries (again)