1. September 30, 2013
Agenda
Roll
PowerPoint on: Deforming the Earth’s Crust
Finish Pangaea Puzzle

2. Subject Area: Deforming the Earth’s Crust
EQ: How does plate motion cause major geologic events?
Questions:
What are the major types of faults?
How do the three major types of faults differ?
What are the most common types of mountains?

3. Deforming the Earth’s Crust
Have you ever tried to bend something, only to have it break? You can bend things that can bow to a point until it will eventually break. This is called stress. Stress is the amount of force per unit area that is put on a given material.

4. Rocks Get Stressed
Compression – occurs when an object is squeezed. An example of this is when two tectonic plates collide
Movie

5. Rocks Get Stressed
Tension – The stress that occurs when forces act to stretch an object. An example of this is when two tectonic plates pull away from each other.
Partner Share:
What are the two forces that stress rock?
The two forces that stress rock are …

6. Folding
Folding occurs when rock layers bend due to the stress of the Earth’s crust. There are several types of folds. Some are called anticlines, synclines, and monoclines.

7. Faulting
Fault – the surface along which rocks break and slide past each other.

8. Faulting
A footwall is the slope down and a hanging wall is the slope up.

9. Faulting
Normal Fault – causes the hanging wall to move down the footwall. Usually happens when tectonic forces pull rocks apart.

10. Faulting
Reverse Fault – causes the hanging wall to move up the footwall. Usually happens when tectonic forces cause compression that pushes rocks together.
Partner Share:
What is the difference between a normal fault and a reverse fault?
The difference between a normal and reverse fault is …

11. Faulting
Strike-slip fault – happens when opposing forces cause rocks to break and move horizontally.
Partner Share:
What is a strike-slip fault?
A strike-slip fault is …

12. Plate Tectonics and Mountain Building
The reason mountains exist is that tectonic plates are continually moving around and bumping into one another. The three most common types of mountains are folded mountains, fault-block mountains, and volcanic mountains.
Movie

13. Folded Mountains
Folded mountains form when rock layers are squeezed together and pushed upward.
Partner Share:
What forms a folded mountain?
Folded mountains are formed when …

14. Fault-block Mountains
Fault-block Mountains form when faulting causes large blocks of the Earth’s crust to drop down relative to other blocks.
Partner Share:
What forms a fault-block mountain?
Fault-block mountains are formed when …

15. Volcanic Mountains
Volcanic Mountains form when molten rock erupts onto the Earth’s surface. They are formed from new material being added to the Earth’s surface.

16. Pangaea Puzzle These will be due on Friday if you do them at home.
Color each piece
Cut out each piece
Arrange on new blank paper (one landmass!)
Glue into place
Title it Pangaea
6. Place labels on each land mass
7. Place Name and Period
8. Draw pictures in blank areas
These will be due on Friday if you do them at home.

17. Why Are Mountains So High?
What did I know? 1. 2. 3.
What did I learn?
What do I want to know
more about?

18. Checking Objectives Describe major types of faults.
Explain how the three major types of faults differ.
Name and describe the most common types of mountains.

19. Class Work
Purple Workbook, Chapter 6, Section 4; Pages 44 – 46.

20. Pop Quiz 1. Name the five layers of the Earth.
On a separate sheet of paper, place your name and period on
the top. Title it Pop Quiz. You will turn this in to me when you
are finished. Do not take this test in your Science Notebook.
1. Name the five layers of the Earth.
2. Name three possible causes of tectonic plate motion.
3. What type of plate boundary is the San Andreas Fault?
4. What word means “all earth?”
Bonus Question
*What is the name of the boundary where Subduction takes
place?*
When you are done sit quietly and get ready to take your notes.