1. Unit 7 Whiteboard Review
Tectonic Plates and Topographic Maps

2. Plate Tectonics Draw force arrows for a convergent boundary
Two plates that go towards each other
What type of landform do two continental plates that converge make?
Mountains
What type of zone is made by a convergent boundary?
Subduction zone

3. Plate tectonics What two landforms do subduction zones make?
Trenches and volcano formation
What type of boundary occurs when two tectonic plates slide horizontally past each other?
Transform
What type of things do transform boundaries cause?
Volcanic and earthquake action, fault lines

4. Plate Tectonics Describe how divergent boundaries move?
The plates move apart from each other
Describe some things that are created by divergent boundaries.
Mid-oceanic ridges, and sea floor spreading.
Describe what seafloor spreading creates.
New oceanic crust

5. Plate Tectonics
Which letter would represent the youngest crust on the mid-oceanic ridge? B C B A

6. Scientist
What is the name of the scientist who has the continental drift theory?
Alfred Wegener
Who is the scientist who proposed the Law of Superposition?
Nicholas Steno
Who is the scientist who came up with the Law of Cross-cutting?
James Hutton

7. Plate Tectonics
What is the layer of the earth that moves the tectonic plates?
Asthenosphere
What is the name of the rocky layer that is broken into tectonic plates?
Lithosphere
Is the outer layer of the core liquid or solid?
Liquid

8. Plate Tectonics
What proof or evidence did Wegener have of continental drift? (name as many as you can)
Same fossils on different continents, glacier deposits and mountain ranges in South America and Africa, and continents “fit” together.

9. Plate Tectonics
What two continents did Wegener first notice? About their mountain ranges and glacier deposits.
South America and Africa
What type of plate boundary has caused the formation of the “ring of fire”?
Convergent boundary (subduction zones)
What type of plate boundary makes NEW crust on Earth?
Divergent boundary ( sea floor spreading)

10. Plate Tectonics
What theory says that the continents are moving on tectonic plates?
Continental Drift Theory
What is Pangaea?
Supercontinent that existed that contained all continents on earth
What is the driving force behind tectonic plate movement?
Convection currents

11. Topographic Maps What do Topographic maps show?
Elevations or depressions of landform
The arrows that are show similar to ‘v’s point upstream or downstream?
Upstream
Lines that are closer together on topo. Maps represent what?
Steep slopes

12. Rock Layers What does the Law of Superposition say about rock layers?
Older layers are on bottom and younger layers are on top.
Which law applies to rocks that cut through layers of rocks?
Law of Cross-cutting

13. Rock Layers Which layer is the youngest? C Which layer is the oldest?B A C B

14. Topographic Maps Which direction is the river flowing? Northeast
Where would the delta be located?
Northeast (at the mouth of the river)

15. Topographic maps What is the contour interval? 50
Estimate what you think the elevation at the peak would be
Higher than 400, less than 450
Does the landform start at sea level?
No – starts at 50
Which part of the landform is the steepest?
Northwest
350
250
150 50