http://www.youtube.com/
watch?v=Kpoko_l34ZE&fea
ture=related

http://www.youtube.com/
watch?v=ryrXAGY1dmE&fe
ature=related
 The lithosphere is broken into separate sections

called plates. They “float” on the asthenosphere
 Sea-floor spreading...
1. Transform Boundaries –
 Crust is neither created nor destroyed
 Place where two plates slip past each

other, moving ...
2. Divergent Boundaries
 Place where two plates move apart
 When develops on land, two of Earth’s plates

pull apart. A ...
3. Convergent Boundaries
 Place where two plates come together
 Converging oceanic plate and oceanic plate collide one

...
 The plates are moving at a very slow rate of about one

to ten centimeters per year.
 In areas plates are moving togeth...
Plate tectonics
Plate tectonics
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Plate tectonics

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Plate tectonics

  1. 1. http://www.youtube.com/ watch?v=Kpoko_l34ZE&fea ture=related http://www.youtube.com/ watch?v=ryrXAGY1dmE&fe ature=related
  2. 2.  The lithosphere is broken into separate sections called plates. They “float” on the asthenosphere  Sea-floor spreading and continental drift into a single theory – The Theory of Plate Tectonics  Plate Tectonics – is the geological theory that states that pieces of Earth’s lithosphere are in constant, slow motion, driven by convection currents in the mantle.  The theory of plate tectonics explains the formation, movement, and subduction of Earth’s plates
  3. 3. 1. Transform Boundaries –  Crust is neither created nor destroyed  Place where two plates slip past each other, moving in opposite directions
  4. 4. 2. Divergent Boundaries  Place where two plates move apart  When develops on land, two of Earth’s plates pull apart. A deep valley called a rift valley forms along the divergent boundary
  5. 5. 3. Convergent Boundaries  Place where two plates come together  Converging oceanic plate and oceanic plate collide one plate is subducted through a trench and volcano islands are formed  Converging oceanic plate and continental plates – when continental plates and oceanic plate collide, the oceanic plate is subducted and volcanoes on land are formed  Converging continental plates – where two continental plates collide, the crust buckles and mountain ranges form.
  6. 6.  The plates are moving at a very slow rate of about one to ten centimeters per year.  In areas plates are moving together and others are moving apart.
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