Name _____________________
Date __________
1.
The Layer of the upper mantle that can flow is the a.
Asthenosphere b.
Lithosphere c.
Inner core d.
Continental crust
2.
Most scientists rejected Wegener’s thoery of continental drift because the theory failed to explain a.
Coal deposits in Antarctica b.
Formation of mountains c.
Climate changes d.
How the continents move
3.
Subduction of the ocean floor takes place at a.
The lower mantle b.
Mid-ocean ridges c.
Rift Valleys d.
Trenches
4.
The process that powers plate tectonics is a.
Radiation b.
Convection c.
Conduction d.
Subduction
5.
Two plates collide with eachother at a.
A divergent boundary b.
A Convergent boundary c.
The boundary between the mantle and the crust d.
A transform boundary
6.
The Earth’s outer core is made of basalt and granite.
7.
The spinning of the asthenosphere, made of iron and nickel, explains why Earth has a magnetic field.
8.
Convection Currents form because of differences of temperatures and density in a fluid.
9.
Magnetic Stripes on the ocean floor are places where oceanic crust sinks back to the mantle.

10.
When two continental plates converge, a rift valley forms.
Name _____________________
Date __________
11.
How is the inner core different from the outer core?
12.
Why are there convection currents in the mantle? Explain.
13.
What evidence of Earth’s climate in the past supports the theory of continental drift?
14.
What was the importance of the discovery that molten rock was coming out of cracks along the mid-ocean range?
15.
How do magnetic stripes form on the ocean floor? Why are these stripes significant?
16.
What happens when a plate of oceanic crust collides with a plate of continental crust?
Why?
17.
Refer to the diagram on page 50 and fill in the blanks needed. a.
b.

Refer to the map on page 51 to answer the next three questions.
Name _____________________
Date __________
18.
Look at the arrows showing the direction of plate motion. In what direction is the part of the plate carrying Australia moving? In what direction is the part carrying India moving?
19.
As India and Australia move in different directions, what type of plate boundary will form between them?
20.
On the map you can see that the northern part of the Indo-Australian plate is moving north and colliding with the Eurasian plate. What features would occur where these plates meet? Explain.

21.
Classify these layers of Earth’s crust as liquid, solid, or solid but able to flow slowly: crust, lithosphere, asthenosphere, outer core, inner core.
22.
How are oceanic and continental crust alike? How do they differ?
23.
What do many geologists think is the driving force of plate tectonics? Explain.
24.
State in one sentence the most significant discovery that geologists established through their study of plate tectonics.
Name _____________________
Date __________