AnswersDRHS GA-GSE Earth SystemsVolcanoes

Volcanoes — Unit test Answers

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1
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What type of stress occurs when plates move apart?

A
compression
B
faulting
C
shearing
D
tension
2
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Which statement describes one aspect of an earthquake’s magnitude?

A
It is measured by the Mercalli scale.
B
It is based on the size of seismic waves.
C
It is not usually affected by the amount of fault movement.
D
It is used to determine damage caused by earthquakes.
3

What is the orientation of the magnetic stripes of iron contained in rocks that support the idea of seafloor spreading?

A
east and west
B
north and east
C
south and west
D
north and south
4

Which type of zone is located at a deep-ocean trench?

A
convergent
B
divergent
C
subduction
D
transform
5

What happened to the giant landmass that Wegener described?

A
The pieces remained the same shape over time.
B
The pieces moved quickly to their current locations.
C
The pieces moved toward one another and created mountains.
D
The pieces broke apart and drifted away from one another over time.
6

The image shows a type of fault.

Question illustration
A
compression
B
gravity
C
tension
D
shearing
7

Which word identifies the agent that carries the energy released from earthquakes?

e
epicenter
f
focus
l
lithosphere
w
waves
8

Which word identifies the shaking that results from movement under Earth’s surface?

A
earthquake
B
fault
C
plate
D
stress
9

From which location does seafloor spreading originate?

A
mid-ocean ridges
B
edges of continents
C
deep-ocean trenches
D
underwater volcanoes
11

How long ago do scientists believe the continents formed Pangaea?

a
about 135 million years ago
a
about 180 million years ago
a
about 300 million years ago
a
about 4.5 billion years ago
12

Which statement describes divergent boundaries?

A
Divergent boundaries are found only on land.
B
Subduction occurs at divergent boundaries.
C
Plates move toward each other at divergent boundaries.
D
Magma flows from cracks in the crust at divergent boundaries.
13

Which statement describes the location of an earthquake’s epicenter?

A
It is located using a single set of data.
B
It is determined by the Mercalli Scale.
C
It is determined by the arrival time of surface waves.
D
It is located at the point directly above the focus
14

Which type of volcanic mountain has wide, gentle slopes?

r
rift
s
shield
c
composite
c
cinder cone
15

The image shows a cross section of a volcano.

Question illustration
A
1
B
2
C
3
D
4
16

Which statement explains what happens to older crust during seafloor spreading?

A
It is destroyed at coastlines.
B
It moves under continents.
C
It is destroyed at a mid-ocean ridge.
D
It moves away from a mid-ocean ridge.

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Lab: Plate Boundaries and Movement