1. Plate Tectonics
Goal:
Homework:
Warm-up:
Locate different types of plate boundaries on the sea floor map.
DR 4.3 “Plate Tectonics” due tomorrow
In your science journal  Look at the diagram on p. 108 – What happens when a continental plate and oceanic plate collide? What is this process called, and why does it happen?

2. Plate Boundaries
To view this animation, click “View” and then “Slide Show” on the top navigation bar.
Animation

3. Geology Articles

4. Plate Boundary Diagrams
On the back of your map:
Transform Boundary
Divergent Boundary
Convergent Boundary
(oceanic/continental)
Convergent Boundary
(oceanic/oceanic)
Convergent Boundary
(continental/continental)

5. Tectonic Plates

6. Mid-Ocean Ridges

7. Deep-Sea Trenches

8. Plate Boundaries
Goal:
Homework:
Warm-up:
Draw diagrams for each of the types of plate boundaries.
none
In your science journal  After watching BrainPop, list and describe each of the three types of plate boundaries. Tell what features you’d expect to find at each type.

9. Seafloor Map

10. Plate Boundaries
Divergent
Convergent
Transform

11. Plate Boundaries
To view this animation, click “View” and then “Slide Show” on the top navigation bar.
Animation

12. So why is it called the “Theory” of Plate Tectonics?
Lithosphere is broken up into many plates
Interaction between the plates causes continents to move and oceans to expand
Earthquakes, volcanoes, and other plate movement all caused by heat trying to escape from the Earth’s interior.
So why is it called the “Theory” of Plate Tectonics?

13. What happens at a divergent boundary?
Mid-Atlantic Ridge
Plates moving apart
Seafloor spreading
Mid-ocean ridge
Volcanic activity

14. How does a new ocean form?
Magma in the ________________ starts to push through and form a new ______.
asthenosphere
rift

15. The Great Rift Valley
___________boundary on a continent
New _______ forming
Divergent
ocean
Label the Great Rift Valley on your seafloor map.
Click here to see what’s happening at this rift valley.

16. Plate Tectonics In your science journal  Goal: Homework: Warm-up:
To draw diagrams of each type of plate boundary.
none
In your science journal 
Look at this diagram of a convergent boundary between two oceanic plates. What causes the trench to form, and what causes the island arc to form?

17. What happens at a transform boundary?
All these “strike-slip” faults surrounding the ridge are called the “fracture zone”.
Plates move laterally past each other
Many earthquakes

18. San Andreas Fault

19. Seafloor Map
Also, label the large transform boundary that cuts across the East Pacific Rise.
Label the San Andreas Fault on your seafloor map.

20. What happens at a convergent boundary?
Plate are pushed together
Depends on which types of plates are converging

21. (oceanic/continental)
Convergent
(oceanic/continental)
Oceanic goes under continental due to greater density
Trench is created off the coast
Mountains created on land due to rising magma
magma

22. The Andes Mountains

23. Convergent (oceanic/oceanic)
The OLDER oceanic plate will sink beneath the other
Trench is created in between the plates
An island arc is created due to rising magma
magma

24. Island Arcs
Japan
Aleutian Islands, Alaska
The Philippines

25. (continental/continental)
Convergent
(continental/continental)
Both plates collide and deform
The crust thickens as mountains are pushed upward
Regional metamorphism takes place

26. The Himalayas

27. For a closer look at anywhere in the world click the map below:

28. Volcanic activity at plate boundaries
To view this animation, click “View” and then “Slide Show” on the top navigation bar.
Animation

29. Plate Boundaries
To view this animation, click “View” and then “Slide Show” on the top navigation bar.
Animation

30. Convection and Tectonics
What causes the plates to move?
Convection and Tectonics
To view this animation, click “View” and then “Slide Show” on the top navigation bar.
Animation

31. CLICK ME! Convection circulation Hottest magma  RISES Cooler magma 
These motions cause _____________
RISES
SINKS
circulation

32. How is a lava lamp like the mantle?
To view this animation, click “View” and then “Slide Show” on the top navigation bar.
Animation

33. Plate Boundary Diagrams
On the back of your map:
Transform Boundary
Divergent Boundary
Convergent Boundary
(oceanic/continental)
Convergent Boundary
(oceanic/oceanic)
Convergent Boundary
(continental/continental)

34. Convergent Boundary
Goal:
Homework:
Warm-up:
To complete and label the features on a profile of the seafloor.
Study for plate tectonics quiz tomorrow
In your science journal 
Without looking at your book, notes, or map, draw and label a diagram showing a convergent boundary between continental and oceanic plates.
You have 60 seconds starting…

35. Convergent Boundary
Goal:
Homework:
Warm-up:
To complete and label the features on a profile of the seafloor.
Study for plate tectonics quiz tomorrow
In your science journal 
Without looking at your book, notes, or map, draw and label a diagram showing a convergent boundary between continental and oceanic plates.
You have 60 seconds starting…
NOW!

36. (continental/oceanic)
Convergent Boundary
(continental/oceanic)

37. How many different plates are there in this diagram?
Subduction Zones
How many different plates are there in this diagram? 1 2 3 4

38. Label the features below:
Subduction Zones
Label the features below:

39. Subduction Zones sea floor spreading subduction oceanic
Identify the plate boundaries by placing a big letter “D” above the divergent boundary and placing a “C” above each convergent boundary.
What process is taking place along the ridge?
What process is taking place at the trenches?
During subduction, a(n) ___________ plate will sink beneath the continental plate.
4. What causes one plate to sink while another floats?
sea floor spreading
subduction
oceanic
Oceanic crust is denser than continental because it’s more mafic in composition.

40. Subduction Zones (continued)
Using a green colored pencil, shade in the area where the youngest ocean rocks would be found. Then, in blue, shade in the area of oldest ocean rock. Which of these areas (green or blue) would have the thickest sediment sitting on top of it, AND why?
Using a red colored pencil, color in 2 areas where you would find melting rock. What happens to the melted rock, and what landforms does it produce?
Blue would have the thickest layers of sediment because it’s older and has had more time to accumulate debris.
The melted rock (magma) rises to the surface because it’s hot (less dense) where it creates volcanoes.

41. Subduction Zones (continued)
On your diagram, draw circular arrows like those in Figure 1 on p. 110 to show the circulation of the magma within the Earth. What is the name of this process?
8. Plate tectonic motion is causing the ___________ Ocean to expand, while the __________ Ocean is getting smaller.
convection
Atlantic
Pacific

42. Advanced Article Assignments
Online Quiz:
Quiz window: Thurs. 10/29 through Mon. 11/2 at 11:59 pm.
Everyone takes both quizzes.
See my website for the links.
Article Summary:
Due Wed. 11/4 (day after ½ day)
Choose ONE article of the two for the Geology Unit.
Everyone EXCEPT presenters
PowerPoint Presentation:
Wed. 11/4
Look at rubric for requirements
Only our two presenting groups (see me after class)