AnswersAZ-Earth and Space Science A SC301Earthquakes

Earthquakes — Unit test Answers

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1
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Which type of zone is located at a deep-ocean trench?

A
convergent
B
divergent
C
subduction
D
transform
2
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When does a natural event become a natural hazard?

A
When the natural event does not cause any changes in the environment.
B
When the natural event occurs without warning.
C
When the natural event only affects uninhabited areas.
D
When the natural event harms people and the environment.
3

Study this image.

Question illustration
A
Oceanic and continental plates are colliding.
B
Oceanic and continental plates are shifting past each other.
C
Two continental plates are forming a large mountain.
D
Two oceanic plates are creating several island chains.
4

Study this image of lithospheric plates.

Question illustration
A
Pacific, Eurasian, and African
B
African, North American, and South American
C
Eurasian, African, and South American
D
North American, Pacific, and African
5

How can humans help minimize the impact of flooding?

A
Increase green spaces in urban areas.
B
Decrease the number of cars on bridges.
C
Increase replacing green space with concrete.
D
Decrease the planting of trees and vegetations.
6

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

A
epicenter
B
focus
C
lithosphere
D
waves
7

How does drilling from fracking impact the likelihood of an earthquake?

A
The drilling can trigger a volcanic eruption.
B
The drilling can cause the ground to shift suddenly.
C
The drilling allows for water to rise to the surface.
D
The drilling can stop an earthquake from happening.
8

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.
9

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

A
seafloor
B
inner core
C
lower mantle
D
asthenosphere
10

From which location does seafloor spreading originate?

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

Which type of volcanic mountain has wide, gentle slopes?

A
rift
B
shield
C
composite
D
cinder cone
12

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.
13

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
14

Which continents contain folded mountains that match up to form one continuous mountain chain, serving as evidence that they once belonged to one landmass called Pangaea?

A
Antarctica and Africa
B
Africa and North America
C
South America and Africa
D
Eurasia and South America
15

The image shows a type of fault.

Question illustration
A
compression
B
gravity
C
tension
D
shearing

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