1. 2-7-18 Plate Tectonics Lab Part III

2. Do Now
Take out homework assignment (Movement of Plate Boundaries Lab Part I & II)
Silently read the procedures for Part III of the lab

3. Plate Tectonics Quiz Thursday, 2/8/18
What is the theory of plate tectonics?
What are the three types of plate boundaries?
Why do tectonic plates move?

4. Lab: Movement of Plate Boundaries Part III
Materials:
1 piece of wax paper
1 graham cracker
1 spoon of frosting (Mr. Santos will dish this out for you)
Join with the same groupmates from yesterday.
Follow procedures on handout and answer the associated questions on the last page.
Cleanup:
Throw away tray and wax paper
You may eat the graham crackers and frosting or throw them away

5. Lab: Movement of Plate Boundaries Part I
13. The graham crackers represent a transform plate boundary. 14. The crumbs represent the broken pieces of the crust (boulders, rock, etc.). 15. The rubbing crackers vibrate and crumble as they slide past each other. 16. The vibrations represent earthquakes.

6. Lab: Movement of Plate Boundaries Part II
17. The water represents mountains that form when two plates collide.
18. The graham crackers represent a convergent plate boundary.
19. The graham cracker did not slide under the other one because both were of equal density and crumbled one another.

7. Lab: Movement of Plate Boundaries Part III
20. The crackers represent a divergent plate boundary.
21. The frosting represents magma.
22. The frosting creates a triangular peak.
23. The formation is a mid-ocean ridge, or mountain range between the plates.

8. 4 Corners Review – Plate Tectonics
1. The theory of states that Earth’s surface consists of plates that move relative to one another.
Plate tectonics
Continental drift
Seafloor spreading
Convection currents

9. 4 Corners Review – Plate Tectonics
2. What is the lithosphere?
A layer of continental crust
A layer of mantle
A layer of crust and solid upper-most mantle
A layer of oceanic crust

10. 4 Corners Review – Plate Tectonics
3. What is the asthenosphere?
A rigid layer of rocks in the crust
A plastic layer of rock in the crust
A layer of Earth’s crust and mantle
A plastic layer of rock in the mantle

11. 4 Corners Review – Plate Tectonics
4. Two plates slide past each other at a ____
Divergent plate boundary
Subduction zone
Transform plate boundary
Convergent plate boundary

12. 4 Corners Review – Plate Tectonics
5. ____ is a type of boundary where two plates separate
Convection plate
Convergent plate
Divergent plate
Transform plate

13. 4 Corners Review – Plate Tectonics
6. ____ is a type of boundary where two plates collide
Transform plate
Convergent plate
Divergent plate
Seafloor plate

14. 4 Corners Review – Plate Tectonics
7. ____ is a force that drags a plate into the mantle
Convection currents
Ridge push
Basal drag
Slab pull

15. 4 Corners Review – Plate Tectonics
8. ____ is circulation of material caused by temperature and density difference
Convection
Ridge push
Seafloor spreading
Slab pull

16. 4 Corners Review – Plate Tectonics
9. Ridge push is the result of ___
Convergence at a plate boundary
Rising mantle at a plate boundary
Plates sliding past each other at a boundary
Gravity pulling on a plate

17. 4 Corners Review – Plate Tectonics
Tie Breaker: First to silently raise hand will be called on.
10. What does the theory of plate tectonics state?
Earth’s surface is made of plates that move with respect to one another.

18. 4 Corners Review – Plate Tectonics
Tie Breaker: First to silently raise hand will be called on.
11. Describe the three forces that are responsible for plate movements.
Convection currents in the mantle produce a force that causes motion called basal drag. Convection currents inside the asthenosphere can drag the lithosphere.
The rising mantle at mid-ocean ridges causes plates to move away from the ridge with a force called ridge push.
At a convergent plate boundary, a force called slab pull pulls on a plate as one edge of the plate sinks into the mantle.