1. Chapter 10, Section 2 Chapter 10, Section 2 Objective 1
Standards
3b. Students know the principal structures that form at the 3 different kinds of plate boundaries.
Objective 1
Summarize the theory of plate tectonics.
Objective 2
Identify and describe the 3 types of plate boundaries.
Objective 3
List and describe 3 causes of plate movement.
Assessment
Flap Book, Chapter Test
Review
Daily Bellwork, Science Starters, Standards Practice
Chapter 10, Section 2
Movie on the Rock Cycle??

2. Key Terms
Create a flashcard for each of the following terms (found on p.247 in your text book).
Plate tectonics
Lithosphere
Asthenosphere
If you finish early, study your flashcards!

3. Plate Tectonics
The theory of Continental Drift led to the theory of PLATE TECTONICS.
PLATE TECTONICS explains how large pieces of the lithosphere, called plates, move and change shape.
Earth’s crust and the rigid, upper part of the mantle = LITHOSPHERE. This is the thin outer shell of Earth (like an Egg shell).
The lithosphere is broken into several pieces called TECTONIC PLATES.
The TECTONIC PLATES ride or float on the ATHENOSPHERE (part of the Earth’s mantle that is flowing slowly).

4. Earth’s Crust
OCEANIC CRUST = dense, made of iron and magnesium-rich rock.
CONTINENTAL CRUST = low density, made of rock rich in silica.
Both kinds of crust are always moving with the tectonic plates they are riding on.

5. Tectonic Plates
15 major tectonic plates.

6. Earthquakes and Volcanoes
Frequent earthquakes in an area are evidence the 2 or more tectonic plates meet in that area.
Many volcanoes form from plate motion and help scientist identify plate boundaries.

7. Quick Check!!
The upper and hard part of the Earth’s mantle is called the ______________________.
The two types of crust are continental and ____________.
Scientists have identified about ______ major tectonic plates.
Name one plate: _________________________________________________________________________________________________________________________________________________________________________________

8. Types of Plate Boundaries
Most of the dramatic changes in Earth’s crust---Volcanoes and Earthquakes---occur at Plate Boundaries.
Divergent
Convergent
Transform

9. Divergent Boundaries 2 plates move away from each other.
Magma from the athenosphere rises to the surface as the 2 plates move apart, the magma cools and creates new oceanic lithosphere(sea-floor spreading).

10. Convergent Boundary
2 plates collide
3 types of Collisions

11. Types of Collisions Oceanic Lithosphere vs. Continental
Oceanic is denser so it sinks under the continental lithosphere
Called a SUBDUCTION ZONE
Deep-ocean trenches and Volcanoes form at SUBDUCTION ZONES
Continental vs. Continental Lithosphere
Neither plate subducts
Colliding edges crumple and thicken causing uplift that forms large mountain ranges.
Oceanic vs. Oceanic Lithosphere
One plate subducts under the other
Deep ocean trench forms
Magma rises to form and ISLAND ARC, or chain of Volcanic Islands

12. Transform Boundaries 2 plates slide past each other horizontally
The edges of the plates scrape and jolt along each other. This motion is felt as Earthquakes.
No Magma is produced

13. Summary—Plate Boundaries
Divergent
Plates moving away from each other to form rifts and mid-ocean ridges
North American and Eurasian plates at the Mid-Atlantic Ridge. Red Sea.
Convergent
Plates moving toward each other and colliding to form ocean trenches, mountain ranges, volcanoes, and island arcs
South American and Nazca plates at the Chilean trench along the west coast of South America. Himalyan mountains, Japan.
Transform
Plates sliding past each other while moving in opposite directions
North American and Pacific Plates at the San Andreas fault in California.

14. Quick Check!!
Name the 3 types of plate boundaries: ____________________________________________________________________________________________________________
San Andreas fault is an example of a _________ boundary.
2 plates moving apart is a _________ boundary.
Mid-Atlantic Ridge is causing South America and _______ to spread apart.

15. Mantle Convection
Ridge Push
Slab Pull
Causes of Plate Motion

16. Mantle Convection
Heat from the Earth’s core heats the material in the Mantle.
The heated material expands and becomes less dense therefore rising around the cooler, denser material above it.
This cycle continues, this is called CONVECTION.
Convection currents cause the tectonic plates above it to move. C

17. Plate Tectonics Animation

18. Plate Tectonics Video Clip

19. Tectonic Plate Boundary Activity
In your group you will create each of the 3 plate boundaries using modeling clay.
p. 253 quick lab and/or modeling activity pdf file uner Ch. 10 folder.
Take pics of finished models? Print and have students label?

20. Assessment
Make a 3-Flap Book showing each of the types of plate boundaries. For each flap include: --Definition/Description --Drawing --Real World Example

21. Daily Quiz
Put into Responders and/or project using SMART notebook. 3 Questions a day.
Oral and on small papers??