1. Plate Boundaries

2. The Earth’s continents and oceans all rest on large, moving _______ called ________ plates. There are ________ of these plates.
plates
tectonic
dozens

3. Each plate touches several other plates
Each plate touches several other plates. The point at which one tectonic plate touches another is called a plate __________.
boundary

4. When two plates move toward each other and collide, it is called a ____________ boundary.
convergent

5. We will look at three different types of convergent boundaries:
Oceanic to continental convergent boundaries
Oceanic to oceanic convergent boundaries
Continental to continental convergent boundaries

6. Oceanic to continental collides
________________________ convergence is when a dense oceanic plate ________ with a relatively light, thick continental plate. The denser oceanic plate is ________ underneath the continental plate. This is called ____________. The continental plate is lifted up and a ___________ range is created.
Oceanic to continental
collides
pushed
subduction
mountain
Video :

7. The _______ Mountains in South America are an example of this type of mountain range.
Andes

8. ___________________ convergence is when two oceanic plates collide
___________________ convergence is when two oceanic plates collide. One plate is usually ___________ under the other. This will form a deep oceanic ________.
Oceanic to oceanic
subducted
trench

9. The _________ Trench is a deep trench created as the result of the Philippine Plate subducting under the Pacific Plate. This is the _________ part of the world’s oceans.
Mariana
deepest

10. This convergence can also result in the formation of undersea ___________. Over many years the volcanoes can rise above sea level and form an _______volcano. Many are strung out in chains called island arcs.
volcanoes
island

11. __________________________ convergence is when two continents meet head-on. The crust tends to _______ and be pushed upward to form mountain ranges.
Continental to continental
buckle

12. The collision of the Indian and Eurasian plates are responsible for the __________ Mountains, the world’s highest mountains.
Himalaya
Eurasian Plate
Indian Plate

13. Convergent boundaries occur above ___________ flowing convection currents.
downward

14. When two plates are moving away from each other it is called a ___________ boundary.
divergent

15. WATCH THE FOLLOWING ANIMATION (scroll down)
First, there are _________ divergent plate boundaries. When this boundary is located in the ocean, it results in the formation of new oceanic ______ from ________ that comes from within the Earth's mantle along a mid-ocean ridge.
oceanic
crust
magma
WATCH THE FOLLOWING ANIMATION (scroll down)

17. Animation created by the US Geological Society.
The process in which new oceanic lithosphere is formed at a midocean ridge is referred to as __________________.
seafloor spreading
Animation created by the US Geological Society.

18. The ___________________ is an example of an oceanic divergent boundary
The ___________________ is an example of an oceanic divergent boundary. It is located along the floor of the ________ Ocean. It is an immensely long mountain chain that extends for about 10,000 miles (16,000 km). Most of the range is ______ water.
Mid-Atlantic Ridge
Atlantic
under

19. Next, there are ___________ divergent plate boundaries
Next, there are ___________ divergent plate boundaries. Here a continental plate is being ______ apart. The result is a __________. A rift valley is a lowland between highlands or a mountain range.
continental
pulled
rift valley

20. The East _______ Rift Valley is an example of this type of plate boundary.
African

21. Here the African Plate is in the process of splitting into two new tectonic plates. The surface of the Earth ________ over time and often fills with ______ from streams and rivers creating lakes or seas.
widens
water

22. Another example can be found in Iceland
Another example can be found in Iceland. Iceland is splitting along the _____________ Ridge. Over time, Iceland may break into two separate land masses as water fills the rift being formed.
Mid-Atlantic

23. Aerial view of Iceland. Can you identify the boundary?

24. Divergent boundaries occur above ________ flowing convection currents.
upward

25. This diagram illustrates the progression of a continental divergent boundary over a long period of time.

26. A __________ boundary is found where two plates are sliding past each other horizontally. The plates slip, then stick as the friction and pressure builds. When the pressure is released, the plates suddenly jerk apart and cause an ____________.
transform
earthquake

28. The ___________________ in California is an example of a transform boundary where the North American and Pacific plates are moving horizontally past each other.
San Andreas Fault

29. San Andreas Fault, CA

30. Plate Boundaries REVIEW
Divergent Boundary – moving _______
Convergent Boundary – moving ___________
Transform Fault Boundary – moving _____________________________.
apart
together
sideways past each other

31. RESOURCES http://en.wikipedia.org/wiki/List_of_tectonic_plates