CSU ES1010 Unit III Assessment

• Question
1
2 out of 2 points

Older,
denser portions of oceanic lithosphere sink into the mantle:

• Question
2
2 out of 2 points

Which
of the following energy sources is thought to drive the lateral motions of
Earth’s lithospheric plates?

• Question
3
2 out of 2 points

How
wide would an ocean basin be if it formed due to the breakup of a
supercontinent 200 million years ago and had an oceanic ridge in the middle
that spread at a rate of 2.5 centimeters per year (25 kilometers per million
years)?

• Question
4
2 out of 2 points

You are
dropped off by helicopter at a site on the land. You are told that it is a
plate boundary. Almost immediately, you feel a weak earthquake. You look around
and note the absence of volcanoes, but you notice an offset stream channel, and
find a vertical fault with two kinds of rock on either side of it. What sort of
plate boundary are you most likely on?

• Question
5
2 out of 2 points

The
distance between a seismological recording station and the earthquake source is
determined from the __________.

• Question
6
8 out of 8 points

Match
the term with the definition
o
Question Selected Match
Lithosphere
Asthenosphere
Convergent
Divergent
Transform

Volcanic island arc
Partial melting
Convection

The crust and the stiff upper mantle combined; this is
broken into plates
The “weak
layer” within the mantle. Motion here is thought to help drive plate
tectonics
Boundary where two
plates move towards one another
Boundary where two
plates move away from one another
Boundary where two
plates slide past one another
The growth of
volcanoes from the ocean floor due to oceanic-oceanic convergence
The downward movement of sediments and oceanic crust at
subduction zones, which generates molten material
Rising of warm
material due to lower density
o

• Question
7
5 out of 8 points

Match
the term with the definition
o
Question Selected Match
Deformation
Fault scarp
Fault
Hypocenter
Epicenter
Anticline
Syncline
Dome

Changes in rock shape due to stresses that exceed the
strength of the rock
Long, low cliffs
produced at Earth’s surface where a fault’s vertical offset is exposed
The spot along a
fault where movement takes place during an earthquake
A fold that is
highest in the middle
The spot on Earth’s surface directly above a fault where
movement takes place during an earthquake
The fracture along
which blocks of rock move relative to each other
A fold that is lowest
in the middle
A broad upwarped
feature that is roughly circular or oval-shaped when viewed from above
o

• Question
8
6 out of 6 points

Put the
breakup of Pangaea in order, from oldest to most recent.

• Question
9
8 out of 10 points

Briefly
describe what happens at a subduction zone

• Question
10
7 out of 10 points

Explain
why Africa and South America are moving apart.

• Question
11
8 out of 10 points

What is
a hot spot? Explain how this forms a volcanic island arc such as Hawaii.

• Question
12
38 out of 38 points

Explain
the difference between intensity and magnitude measurements when evaluating an
earthquake. What scales are used to measure each? What are the strengths and
weaknesses associated with each type of measurement?

Your response should be at least 200 words in length.