Mountain Building
Practice Test
1.
What happens when two continental crusts converge?
a.
Both plates are deformed and pushed upward.
b.
The plate moving faster is subducted.
c.
Large, normal faults occur at the suture of the plates.
d.
Both plates are subducted at the same time.
2.
What is isostatic rebound?
a.
when oceanic crust rises above continental crust
b.
the process of mountains eroding to flat ground
c.
how the mantle keeps mountains upright
d.
when the crust rises as it loses overlying material and mass
3.
Why does continental crust rise higher above the surface of Earth than oceanic crust?
a.
Oceanic crust is under continental crust.
b.
Continental crust is less dense than the mantle.
c.
Continental crust is thicker and is less dense.
d.
Continental crust is thinner and less dense.
4.
The roots of a mountain are __________.
a.
often shallower than the mountain is high
b.
often many times deeper than the mountain is high
c.
always as deep as the mountain is high
d.
always the same depth as the mountain is high
5.
The Mid-Atlantic Ridge mountains are an example of mountains forming at __________.
a.
divergent boundaries
b.
hot spots
c.
convergent boundaries
d.
uplifted areas
6.
Which is not a boundary mountain?
a.
some volcanoes
b.
uplifted mountains
c.
fault-block mountains
d.
island arc complexes
7.
The Adirondack Mountains are an example of mountains that formed due to __________.
a.
faults
b.
divergence at plate boundaries
c.
uplift
d.
convergence at plate boundaries
8.
Why do mountains have roots?
a.
Mountains are less dense than their roots.
b.
The roots of mountains keep the mountains in one geographic location.
c.
The roots provide buoyancy to support the large mass of the mountains.
d.
If erosion removes mass from the mountains, the roots will keep the continental crust at the same elevation.
9.
What are two main elevation modes on Earth?
a.
0 km to 1 km above sea level and 4 km to 5 km below sea level
b.
4 km to 5 km above sea level and 0 km to 1 km below sea level
c.
1 km to 4 km above sea level
d.
4 km to 5 km above sea level
10.
The Hawaiian Islands are made of volcanoes that formed due to __________.
a.
uplift
b.
divergence at plate boundaries
c.
convergence at plate boundaries
d.
hot spot activity
11.
The tallest mountains on Earth are formed by __________.
a.
hot spots
b.
continental-continental convergence
c.
oceanic-oceanic convergence
d.
oceanic-continental convergence
12.
Mount Pinatubo is an example of a mountain formed from __________.
a.
an oceanic-continental convergence
b.
a hot spot
c.
a continental-continental convergence
d.
an oceanic-oceanic convergence
13.
The Mid-Atlantic Ridge is __________.
a.
made of mountains with steep slopes
b.
a long, continuous chain
c.
made of igneous rocks with high silica content
d.
approximately 5000 km long
14.
What features do oceanic-continent and oceanic-oceanic convergences have in common?
a.
crustal thickening
b.
trenches
c.
large mountain ranges and subduction zones
d.
subduction zones and trenches
15.
The Appalachian Mountains are an example of mountains that formed at __________.
a.
fault-block areas
b.
divergent boundaries
c.
spreading centers
d.
convergent boundaries
