Earth Science Geology, the Environment, and the Universe

Chapter 20: Mountain Building

Standardized Test Practice-English

1
The roots of a mountain are __________
A)often many times deeper than the mountain is high
B)always as deep as the mountain is high
C)always the same depth as the mountain is high
D)often shallower than the mountain is high
2
What is isostasy?
A)continental curst floating on top of oceanic crust
B)mantle material upwelling around crustal material because of gravity
C)equilibrium that has been established between continental crust, oceanic crust and the mantle
D)continental and oceanic crust displacing the mantle
3
Why do mountains have roots?
A)If erosion removes mass from the mountains, the roots will keep the continental crust at the same elevation.
B)The roots provide buoyancy to support the large mass of the mountains.
C)Mountains are less dense than their roots.
D)The roots of mountains keep the mountains in one geographic location.
4
The Adirondack Mountains are an example of mountains that formed due to __________.
A)uplift
B)faults
C)divergence at plate boundaries
D)convergence at plate boundaries
5
Compared to continental crust, oceanic crust is ________.
A)less dense and thinner
B)less dense and thicker
C)denser and thinner
D)denser and thicker
6
What causes differences in elevation on Earth?
A)density and thickness of the crust
B)vertical dikes and pillow basalts
C)seamounts and hot spots
D)uplifted and faulted mountains
7
Which of the following is not associated with orogeny at convergent boundaries?
A)island arcs
B)highly folded and faulted ranges
C)ocean ridges
D)deformed sedimentary rocks
8
What type of mountains are generally made up of undeformed rocks?
A)fault-block mountains
B)uplifted mountains
C)convergent-boundary mountains
D)continental mountains
9
Why would a certain thickness of continental crust displace less of the mantle than the same thickness of oceanic crust?
A)continental crustis more dense
B)continental crust is less dense
C)continental crust is mainly basalt
D)continental crust is closer to the mantle
10
Which of the following can not form as the result of oceanic-oceanic convergence?
A)rift zones
B)trenches
C)subduction zones
D)island arc complexes
11
Which type of mountains form as the result of uplift far from plate boundaries?
A)oceans ridges
B)uplifted mountains
C)faulted mountains
D)volcanic ranges
12
What potential damage would a rock slide have on a river?
A)changing the chemical composition of the river
B)the changing of the physical characteristics of the river
C)permanently increasing water levels
D)damming rivers and causing flooding
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