Your SlideShare is downloading. ×
  • Like
Plate tectonics
Upcoming SlideShare
Loading in...5

Thanks for flagging this SlideShare!

Oops! An error has occurred.


Now you can save presentations on your phone or tablet

Available for both IPhone and Android

Text the download link to your phone

Standard text messaging rates apply


  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads


Total Views
On SlideShare
From Embeds
Number of Embeds



Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

    No notes for slide


  • 1. Plate TectonicsLiz LaRosa for use with my 5th Grade Science Class 2009
  • 2. Earth’s Layers The Earths rocky outer crust solidified billions of years ago, soon after the Earth formed. This crust is not a solid shell; it is broken up into huge, thick plates that drift atop the soft, underlying mantle.
  • 3. The Crust• Outermost layer• 5 – 100 km thick• Made of Oxygen, Silicon, Aluminum
  • 4. The Mantle• Layer of Earth between the crust and the core• Contains most of the Earth’s mass• Has more magnesium and less aluminum and silicon than the crust• Is denser than the crust
  • 5. The Core• Below the mantle and to the center of the Earth• Believed to be mostly Iron, smaller amounts of Nickel, almost no Oxygen, Silicon, Aluminum, or Magnesium
  • 6. Tectonic Plates
  • 7. Plate Tectonics• Greek – “tektonikos” of a builder• Pieces of the lithosphere that move around• Each plate has a name• Fit together like jigsaw puzzles• Float on top of mantle similar to ice cubes in a bowl of water
  • 8. Continental Drift Alfred Wegener 1900’s Continents were once a single land mass that drifted apart. Fossils of the same plants and animals are found on different continents Called this supercontinent Pangea, Greek for “all Earth” 245 Million years ago Split again – Laurasia & Gondwana 180 million years ago
  • 9. Evidence of Pangea
  • 10. Sea Floor Spreading
  • 11. Sea Floor Spreading• Mid Ocean Ridges – underwater mountain chains that run through the Earth’s Basins• Magma rises to the surface and solidifies and new crust forms• Older Crust is pushed farther away from the ridge
  • 12. How Plates Move
  • 13. Different Types of Boundaries
  • 14. Divergent Boundary –Arabian and African Plates
  • 15. Divergent Boundary – Iceland
  • 16. Divergent Boundary - Oceanic
  • 17. Divergent Boundary - Continental
  • 18. Convergent Boundary – Indian and Eurasian Plates
  • 19. Convergent Boundary – Oceanic & Continental &
  • 20. Convergent Boundary – Oceanic & Oceanic &
  • 21. Convergent Boundaries - Continental &
  • 22. Transform Boundary – San Andreas Fault
  • 23. Review• Name the 3 main layers of the Earth• What is a tectonic plate?• What was Pangea?• What is Sea-Floor spreading?• Name the three different types of plate boundaries and one location on Earth for each one