Multiple
Choice
Identify the letter of the choice that best completes the statement or answers the
question.
|
|
|
1.
|
The youngest rocks on the ocean
floor are located ____. a. | near
continents | c. | far from mid-ocean ridges | b. | at mid-ocean
ridges | d. | near Asia | | | | |
|
|
|
2.
|
The crust and upper mantle make
up Earth's ____. a. | lithosphere | c. | core | b. | asthenosphere | d. | continents | | | | |
|
|
|
3.
|
Scientists have observed that
the plates move at rates ranging from 1 cm to 12 cm per ____. a. | century | c. | day | b. | decade | d. | year | | | | |
|
|
|
4.
|
Plates of the lithosphere float
on the ____. a. | crust | c. | core | b. | asthenosphere | d. | atmosphere | | | | |
|
|
|
5.
|
The presence of the same ____
on several continents supports the hypothesis of continental drift. a. | fossils | c. | neither a nor b | b. | rocks | d. | both a and b | | | | |
|
|
|
6.
|
The hypothesis that continents
have slowly moved to their current locations is called ____. a. | continental drift | c. | magnetic reversal | b. | continental slope | d. | convection | | | | |
|
|
|
7.
|
Plates move apart at ____
boundaries. a. | convergent | c. | divergent | b. | stable | d. | transform | | | | |
|
|
|
8.
|
The alignment of iron minerals
in rocks when they are formed reflects the fact that Earth's ____ has reversed itself several times
in the past. a. | magnetic field | c. | asthenosphere | b. | core | d. | gravity | | | | |
|
|
|
9.
|
A lack of explanation for
continental drift prevented many scientists from accepting that a single supercontinent called ____
once existed. a. | Glomar | c. | Pangaea | b. | Glossopteris | d. | Wegener | | | | |
|
|
|
10.
|
The Glomar Challenger
provided support for the theory of plate tectonics by providing ____. a. | high-altitude photos of existing continents | b. | samples of plant life from mid-ocean ridges | c. | samples of older rock found far from mid-ocean ridges | d. | direct measurements of the movement of continents | | |
|
|
|
11.
|
Plates slide past one another
at ____. a. | subduction zones | c. | convection
currents | b. | transform boundaries | d. | divergent
boundaries | | | | |
|
|
|
12.
|
The boundary between two plates
moving together is called a ____. a. | divergent
boundary | c. | transform boundary | b. | convergent
boundary | d. | lithosphere | | | | |
|
|
|
13.
|
Seafloor spreading occurs
because ____. a. | new material is being added to the
asthenosphere | b. | earthquakes break apart the ocean floor | c. | sediments accumulate at the area of spreading | d. | molten material beneath Earth's crust rises to the surface | | |
|
|
|
14.
|
Continental drift states that
continents have moved ____ to their current location. a. | vertically | c. | quickly | b. | slowly | d. | very little | | | | |
|
|
|
15.
|
Wegener believed that the
continents originally broke apart about ____ years ago. a. | 200 million | c. | 400 million | b. | 300
million | d. | 500 million | | | | |
|
|
|
16.
|
A fossil plant that helps
support the theory of continental drift is ____. a. | Mesosaurus | c. | Glomar | b. | Glossopteris | d. | Pangaea | | | | |
|
|
|
17.
|
Matching ____ on different
continents are evidence for continental drift. a. | river
systems | c. | weather patterns | b. | rock
structures | d. | wind systems | | | | |
|
|
|
18.
|
Bands of rock on the seafloor
showing alternating magnetic orientation indicate Earth's magnetic field has ____. a. | reversed itself in the past | c. | become stronger | b. | weakened | d. | remained the same | | | | |
|
|
|
19.
|
____ currents inside Earth
might drive plate motion. a. | Vertical | c. | Horizontal | b. | Convection | d. | none of the above | | | | |
|
|
|
20.
|
Scientists believe that
differences in ____ cause hot, plasticlike rock in the asthenosphere to rise toward Earth's
surface. a. | density | c. | weight | b. | magnetism | d. | composition | | | | |
|
|
|
21.
|
The Great Rift Valley in Africa
is a ____. a. | mid-ocean ridge | c. | convergent
boundary | b. | divergent boundary | d. | transform
boundary | | | | |
|
|
|
22.
|
Active volcanoes are most
likely to form at ____. a. | transform
boundaries | b. | divergent boundaries | c. | the center of continents | d. | convergent oceanic–continental
boundaries | | |
|
|
|
23.
|
____ are formed when two
continental plates collide. a. | Volcanoes | c. | Mountain ranges | b. | Strike-slip faults | d. | Rift valleys | | | | |
|
|
|
24.
|
A ____ forms where two oceanic
plates collide. a. | hot spot | c. | transform boundary | b. | subduction zone | d. | rift valley | | | | |
|
|
|
Figure 4F-1
|
|
|
25.
|
According to Figure 4F-1, what
type of plate boundary occurs between the North American Plate and the Eurasian
Plate? a. | transform boundary | b. | divergent boundary | c. | convergent oceanic-continental plate
boundary | d. | convergent oceanic-oceanic plate boundary | | |
|
|
|
26.
|
According to Figure 4F-1, what
type of plate boundary occurs between the Nazca Plate and the South American Plate? a. | convergent oceanic-continental plate boundary | b. | convergent oceanic-oceanic plate boundary | c. | convergent continental-continental plate boundary | d. | transform boundary | | |
|
Matching
|
|
|
Match each term with the
correct statement below. a. | mid-ocean
ridge | d. | subduction zone | b. | convergent
boundary | e. | continental drift | c. | asthenosphere | | | | |
|
|
|
27.
|
Earth's thick, plasticlike
layer is the _____.
|
|
|
28.
|
Plates move together at a(n)
_____.
|
|
|
29.
|
One plate is forced under
another in a(n) _____.
|
|
|
30.
|
A(n) _____ is an underwater
mountain chain.
|
|
|
31.
|
The main points of evidence for
_____ are fossils, rocks, and climate.
|
Short
Answer
|
|
|
32.
|
What is the difference between
a convergent and a divergent plate boundary?
|