Download Discovering Plate Tectonics PDF Name

Discovering Plate Tectonics PDF
Name: ____________________________________________________________ Period: ____ Date: ___________
Essential Question: How do the movements of plates impact the lithosphere (crust and upper mantle)?
1. Who proposed the theory of continental drift?
____________________________________________________________________________________________
2. Alfred Wegener proposed the theory of continental drift because he noticed…
____________________________________________________________________________________________
3. What evidences did he find to support his theory on continental drift?
____________________________________________________________________________________________
4. What question stopped Wegener from proving his theory on continental drift?
____________________________________________________________________________________________
5. Why was his, Wegener, theory forgotten?
____________________________________________________________________________________________
6. Who found the answer to Wegener’s question on how continents move?
____________________________________________________________________________________________
7. What did geologist Harry Hess found about how continents move?
____________________________________________________________________________________________
8. What is the mid-ocean ridge?
____________________________________________________________________________________________
9. What is a rift valley?
__________________________________________________________________________________________
10. Where does sea floor spreading happen?
____________________________________________________________________________________________
11. How does sea floor spreading happen?
__________________________________________________________________________________________
12. What fills the gap in the ridge?
____________________________________________________________________________________________
13. In the fourth paragraph, what does the word “giant conveyor belt” refers to? Think!
____________________________________________________________________________________________
14. What is created in the mid-ocean ridge?
____________________________________________________________________________________________
15. Why is Earth not growing is spite of the new ocean floor added?
____________________________________________________________________________________________
____________________________________________________________________________________________
16. What evidences were used by scientists to prove that new ocean crust is produced in the mid-ocean ridge at the
Atlantic ocean and old crust sinks in the trenches in the Pacific ocean?
____________________________________________________________________________________________
17. What lead to the theory of plate tectonics?
____________________________________________________________________________________________
____________________________________________________________________________________________
18. What is the theory of plate tectonics?
____________________________________________________________________________________________
____________________________________________________________________________________________
19. Where do the tectonic plates float? _______________________________________________________________
____________________________________________________________________________________________
19. What are the different types of plate boundaries?
____________________________________________________________________________________________
____________________________________________________________________________________________
20. Why are divergent boundaries called constructive boundaries? Think!
____________________________________________________________________________________________
____________________________________________________________________________________________
Instructions: Write the letter of your answer on the space before each number.
____1. What evidence did Wegener have for his theory of continental drift?
a. He had no evidence.
b. He knew that plant and animal fossils, as well as rock layers, matched on the two continents of Africa and
South America.
c. He explained how continents moved apart.
____2. Why was Wegener’s theory forgotten?
a. He could not explain how the continents could move.
b. It was not a good theory.
c. He did not publish his theory.
____3. Who came up with the theory of sea floor spreading?
a. Alfred Wegener
b. Harry Hess c. ancient Greeks
____4. Where does sea floor spreading happen?
a. at the rift valley along the mid-ocean ridges
b. at deep sea trenches
c. at the Ring of Fire
____5. What material forms new ocean floor?
a. sediment
b. magma
c. plates
____6. Where is old crust melted back into magma?
a. at the mid-ocean ridge
b. along plate boundaries
c. at deep-sea trenches
____7. This process of old crust being pulled down and remelted is called:
a. sea floor spreading
b. subduction
c. plate tectonics
____8. The evidence that rocks closer to mid ocean ridges are younger than rocks farther away supports the theory of:
a. sea floor spreading
b. subduction
c. plate tectonics
____9. The theory of plate tectonics combine which two other theories?
a. sea floor spreading and continental drift
b. sea floor spreading and tidal theory
c. continental drift and fossil theory
____10. Large pieces of the lithosphere that float on the asthenosphere are called:
a. tectonic plates
b. the mid-ocean ridge
c. deep-sea trenches
____11. The partly-melted lower mantle is called:
a. magma
b. the lithosphere
c. the asthenosphere
____12. A boundary where plates move away from each other is called:
a. divergent
b. convergent
c. transform
____13. Why is a divergent boundary also called a constructive boundary?
a. Magma flows up between the plates and forms new crust.
b. Old ocean floor is re-melted into magma.
c. Animals in the ocean construct nests there.
____14. An example of a convergent boundary is a:
a. volcano
b. mid-ocean ridge
c. deep-sea trench
____15. A deep crack in the earth’s surface is called a:
a. ridge
b. fault
c. plate
____16. How do the plates move at a transform boundary?
a. They move toward each other. b. They move away from each other. c. They move past each other.
Matching Type:
______ continental-continental convergent boundary
______ oceanic-continental convergent boundary
______ oceanic-oceanic convergent boundary
______ divergent boundary
______ transform boundary
A. trenches, volcanoes, subduction, island arc
B. trenches, volcanoes, subduction
C. Appalachian mountains, Himalayas
D. Sea floor spreading ( Atlantic Ocean), Rift Valley ( Afdrica)
E. San Andreas fault ( California )
Videos: http://www.youtube.com/watch?v=ELd3ebldSTs
http://www.youtube.com/watch?v=oXYAdzmwQsc
Discovering Plate Tectonics KEY
1. b
2. a
3. b
4. a
5. b
6. c
7. b
8. a
9. a
10. a
11. c
12. a
13. a
14. c
15. b
16. c
Matching Type:
C
B
A
D
E
Define the following vocabulary words.
a. Divergent boundary- _________________________________________________________
___________________________________________________________________________
b. Mid-Atlantic ridge - __________________________________________________________
___________________________________________________________________________
c. Convergent boundaries- ______________________________________________________
___________________________________________________________________________
d. Deep-sea trench - ____________________________________________________________
___________________________________________________________________________
e. Ring of Fire - ________________________________________________________________
___________________________________________________________________________
f.
Fault - _____________________________________________________________________
___________________________________________________________________________
g. San Andreas fault - ___________________________________________________________
___________________________________________________________________________
http://www.youtube.com/watch?v=lsZq1pNufNg