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Plate Tectonics

1/4/2010

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Asthenosphere-  Under the lithosphere-  includes under the plastic mantle and the rest of the mantle-  What the plates sit on. 

 Continental Drift- Hypothesis that pieces of land broke apart and drifted apart over time.

Convection Currents- Movements where heat rises and cold sinks.  Cold moves to hot and the process repeats.  We believe that these currents occurred in the mantle to cause the cracking of the plates.

Pangaea- The ONE continent that was on Earth before they broke apart.

Lithosphere-  The layer that includes the Plastic Mantle and the crust.  It is the area that we live on. Composed of both Oceanic and continental plates

Plate- Pieces of the lithosphere that include continents and oceans.  They are divided by the cracks that occurred as a result of convection currents.

Sea floor spreading-  A theory that along an ocean ridge, a rift allows new magma to come up and push the two plates apart, which in turn moves the continents farther apart.
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  • Home
  • Earth Sci Labs
  • 7th Grade ON-LINE TEXTBOOK
  • 7th Grade
    • 7th grade Lab Reports
    • Current events
    • 7th 1- Scientific Theory
    • 7th Lanforms & Maps >
      • Mountain Project
      • Mineral/ Gem Project
    • 7th 3- Geology >
      • Weathering & Erosion
      • Fossil Project
      • Plate Tectonics
      • Earthquakes
      • Unit Test Review
    • 7th Unit 4 Atoms >
      • 7th Atom Brochure
  • Earth Science by topic
  • Submit Homework
  • 8th Grade Units 1-4
    • Unit 1 Models of the Earth >
      • Metric Review
      • Chapter1 Review
      • Chapter 2
      • Topographic Maps
    • Unit 2 Rocks & Minerals >
      • Minerals
      • Rocks
    • Unit 3 Dynamic Crust >
      • Earthquakes
      • Earthquakes & Interior
      • Hot Spots
      • Volcano
      • Dynamic Crust Review >
        • Practice Tests
    • Unit 4 Shaping the Earth's Surface >
      • Weathering
      • chemical weathering
      • Another Weathering video
      • Erosion Videos
      • Glaciers >
        • Glacier Pwr points
      • Changing Earth
      • Unit Review
  • 8th Grade Units 5-9
    • Unit 5 Earth History >
      • Archean History
      • Geological Eras
      • Geologic Sequence Project
      • Unit 5 Review
    • Unit 6 & 7 Climate & Meteorology >
      • 801 Vacation Work
      • Weather Tracking HW Lab
      • Meteorology info
      • Station Models
      • Wind
      • Storms
      • Weather & Climate Review Tests
    • Unit 8 Earth & Space
  • 801 Test Review
  • Ways to pass the regents
  • files
  • Other Important Links
  • New Page