AnswersAZ-Earth and Space Science A SC301Earthquakes

Earthquakes — Unit test Answers

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1
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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.
2
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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
3

According to the theory of plate tectonics, which is one feature that plates carry?

A
seafloor
B
inner core
C
lower mantle
D
asthenosphere
4

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

A
earthquake
B
fault
C
plate
D
stress
5

Where does compression often occur?

A
along a normal fault
B
along a strike-slip fault
C
at a divergent boundary
D
at a convergent boundary
6

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

A
epicenter
B
focus
C
lithosphere
D
waves
7

What type of stress occurs when plates move apart?

A
compression
B
faulting
C
shearing
D
tension
8

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.
9

Which coal field location is related to coal fields in the United States and supports the theory of continental drift?

A
India
B
Africa
C
Australia
D
Europe
10

The image shows a landform created by Earth’s forces.

Question illustration
A
anticline
B
shearing
C
syncline
D
tension
11

Which type of volcanic mountain has wide, gentle slopes?

A
rift
B
shield
C
composite
D
cinder cone
12

The image shows a cross section of a volcano.

Question illustration
A
1
B
2
C
3
D
4
13

The image shows a type of fault.

Question illustration
A
compression
B
gravity
C
tension
D
shearing
14

The table shows the thickness, top density, and bottom density of the different layers of the Earth. Thickness (km)Density (g/cm3)Types of Rock FoundTopBottomCrust302.22.9Silicic rocksUpper mantle7203.44.4PeridotiteLower mantle2,1714.45.6Magnesium and silicon oxidesOuter core2,2599.912.2Iron+oxygenInner core1,22112.813.1Iron+oxygen

A
As depth increases, the density of the layers increases.
B
As depth increases, the density of the layers decreases.
C
As depth increases, the thickness of the layers increases.
D
As depth increases, the thickness of the layers decreases.
15

How long ago do scientists believe the continents formed Pangaea?

A
about 135 million years ago
B
about 180 million years ago
C
about 300 million years ago
D
about 4.5 billion years ago

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