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Plate TectonicsLiz LaRosa for use with my 5th Grade Science Class   http://www.middleschoolscience.com 2009
Earth’s Layers           The Earths rocky           outer crust solidified           billions of years ago,           soon...
The Crust• Outermost layer• 5 – 100 km thick• Made of Oxygen, Silicon, Aluminum
The Mantle• Layer of Earth  between the crust  and the core• Contains most of the  Earth’s mass• Has more  magnesium and l...
The Core• Below the mantle  and to the center of  the Earth• Believed to be mostly  Iron, smaller  amounts of Nickel,  alm...
Tectonic Plates
Plate Tectonics•   Greek – “tektonikos” of a builder•   Pieces of the lithosphere that move around•   Each plate has a nam...
Continental Drift                                                                  Alfred Wegener 1900’s                  ...
Evidence of Pangea
Sea Floor Spreading
Sea Floor Spreading• Mid Ocean Ridges – underwater mountain  chains that run through the Earth’s Basins• Magma rises to th...
How Plates Movehttp://pubs.usgs.gov/gip/dynamic/unanswered.html
Different Types of Boundaries  http://pubs.usgs.gov/gip/dynamic/understanding.html
Divergent Boundary –Arabian and African Plates
Divergent Boundary –                  Icelandhttp://pubs.usgs.gov/gip/dynamic/understanding.html
Divergent Boundary - Oceanic         http://www.geology.com
Divergent Boundary - Continental        http://www.geology.com
Convergent Boundary – Indian and Eurasian Plates
Convergent Boundary – Oceanic & Continental       http://pubs.usgs.gov/gip/dynamic/understanding.html & http://www.geology...
Convergent Boundary – Oceanic & Oceanic     http://pubs.usgs.gov/gip/dynamic/understanding.html & http://www.geology.com
Convergent Boundaries - Continental  http://pubs.usgs.gov/gip/dynamic/understanding.html & http://www.geology.com
Transform Boundary – San Andreas Fault           www.geology.com
Review•   Name the 3 main layers of the Earth•   What is a tectonic plate?•   What was Pangea?•   What is Sea-Floor spread...
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Plate tectonics

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Transcript of "Plate tectonics"

  1. 1. Plate TectonicsLiz LaRosa for use with my 5th Grade Science Class http://www.middleschoolscience.com 2009
  2. 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. 3. The Crust• Outermost layer• 5 – 100 km thick• Made of Oxygen, Silicon, Aluminum
  4. 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. 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. 6. Tectonic Plates
  7. 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. 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 agohttp://members.enchantedlearning.com/subjects/astronomy/planets/earth/Continents.shtml
  9. 9. Evidence of Pangea
  10. 10. Sea Floor Spreading
  11. 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. 12. How Plates Movehttp://pubs.usgs.gov/gip/dynamic/unanswered.html
  13. 13. Different Types of Boundaries http://pubs.usgs.gov/gip/dynamic/understanding.html
  14. 14. Divergent Boundary –Arabian and African Plates
  15. 15. Divergent Boundary – Icelandhttp://pubs.usgs.gov/gip/dynamic/understanding.html
  16. 16. Divergent Boundary - Oceanic http://www.geology.com
  17. 17. Divergent Boundary - Continental http://www.geology.com
  18. 18. Convergent Boundary – Indian and Eurasian Plates
  19. 19. Convergent Boundary – Oceanic & Continental http://pubs.usgs.gov/gip/dynamic/understanding.html & http://www.geology.com
  20. 20. Convergent Boundary – Oceanic & Oceanic http://pubs.usgs.gov/gip/dynamic/understanding.html & http://www.geology.com
  21. 21. Convergent Boundaries - Continental http://pubs.usgs.gov/gip/dynamic/understanding.html & http://www.geology.com
  22. 22. Transform Boundary – San Andreas Fault www.geology.com
  23. 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
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