Download Plate Tectonics

Name:
Plate Tectonics
Number:
Multiple Choice:
Write the letter of the correct answer on the line at the left. (1 point each)
_____ 1. Scientists rejected Wegener’s theory because he could not
a. explain why continental crust was denser that oceanic crust
b. describe the climate of Pangaea
c. explain what force pushes or pulls continents
d. describe how seeds moved from Africa to South America
_____ 2. Subduction is
a. the process by which oceanic crust sinks beneath trenches and back into
the mantle.
b. the direct transfer of heat through solid materials.
c. the process that continually adds ocean floor.
d. a device that bounces sound waves off under water objects.
_____ 3. Who first proposed the theory of continental drift?
a. Harry Hess
b. Alfred Wegener
c. Pangaea
d. Tuzo Wilson
_____ 4. What is the name of the single landmass that broke apart 200 million
years ago?
a. Lithosphere
b. Iceland
c. Pangaea
d. continental drift
_____ 5. A layer of solid rock that includes both dry land and ocean floor is
called:
a. mantle
b. crust
c. Inner core
d. outer core
_____ 6. A section of the crust that slowly moves over the mantle, carrying pieces
of continental and oceanic crust is called:
a. fossil
b. sonar
c. plate
d. basalt
_____ 7.
a.
b.
c.
d.
What is the theory of plate tectonics?
It explains the force that pulls or pushes the continents.
It explains the places where 2 plates move apart or diverge.
It explains that part of the ocean floor sinks back into the mantle.
It explains the formation, movement, and subduction of Earth’s plates.
Fill in the answer:
8. The core has a ____________ outer layer and a __________inner layer.
9. The process by which molten material adds new oceanic crust to the ocean floor
is _____________________________.
10. __________________________ are an indirect type of evidence and
________________ are a direct way to learn about the Earth’s interior.
11. The core is made up of ____________ and _________________.
12. What was Wegener’s hypothesis of Continental Drift?
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
Use the diagram below to answer question 13.
1.
4.
13. Name each layer of the Earth
1. _____________________
2. _____________________
3. _____________________
4. _____________________
3.
Bonus Questions:
2.
1. What were three types of evidence that supported Hess’s theory of sea floor
spreading?
a. ____________________________________________________________
b. ____________________________________________________________
c. ____________________________________________________________
2. What three types of evidence supported Wegener’s hypothesis?
a. ____________________________________________________________
b. ____________________________________________________________
c. ____________________________________________________________