AnswersEarth and Space A 26-27Earth's Interior

Earth's Interior Answers

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1
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Study the diagram showing the range of temperature in the Earth’s layers.

Question illustration
A
The outer core is the hottest region.
B
The mantle is hotter than the outer core.
C
The continental crust is the coolest region.
D
The inner core is cooler than the lithosphere.
2
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Which statement describes how the mantle is similar to Earth’s oceanic crust?

A
It is composed mostly of basalt.
B
It consists primarily of molten rock.
C
It has varying degrees of thickness.
D
It is divided into two layers.
3

Study the images of Earth’s crust and mantle in two different areas.How is Item A different from Item B?

Question illustration
A
The crust under the ocean in Item A is thicker than the crust under the mountain in Item B.
B
The mantle under the ocean in Item A is thinner than the mantle under the mountain in Item B.
C
The crust in Item A is found partially below sea level as compared to the crust in Item B.
D
The mantle in Item A is located far below a mountain as compared to the mantle in Item B.
4

The composition of rocks affects their densities and the densities of Earth’s layers. Use what you have learned and the information in the table to answer the question.In which order would these rocks and minerals be found in the layers of Earth from the crust to the lower mantle?

Question illustration
A
eclogite, perovskite, rhyolite, stishovite
B
stishovite, rhyolite, perovskite, eclogite
C
stishovite, perovskite, eclogite, rhyolite
D
rhyolite, eclogite, perovskite, stishovite
5

best

H
Hot material near Earth’s surface is more dense and sinks, and when it cools, it becomes less dense and rises.
H
Hot material near the core is more dense and rises, and when it cools, it becomes less dense and sinks.
H
Hot material near Earth’s surface is less dense and sinks, and when it cools, it becomes more dense and rises.
H
Hot material near the core is less dense and rises, and when it cools, it becomes more dense and sinks.
6

Study the image of a seismic graph.About how far does the S wave travel through Earth in 13 minutes?

Question illustration
A
2,000 km
B
4,000 km
C
6,000 km
D
8,000 km
10

Which object can an S wave travel through?

a
air
m
magma
s
soil
w
water
11

Study the table about Earth’s interior.If silicic rock is found in a core sample, what evidence does this provide about the rock’s location?

Question illustration
A
Its location is likely underneath an ocean or a mountain.
B
Its location is likely denser than Earth’s lithosphere.
C
Its location likely has a consistency that changes from solid to liquid.
D
Its location likely contributes to the creation of Earth’s magnetic field.
12

Study the graph about seismic waves.What does the graph show?

Question illustration
T
The S and P waves travel the same distance through Earth’s crust in the same amount of time.
T
The P wave travels through Earth’s crust more quickly than the S wave travels.
I
It takes the P wave 18 minutes to travel 6,000 km through Earth’s crust.
I
It takes the S wave 11 minutes to travel 8,000 km through Earth’s crust.
13

Which statement describes a characteristic of the asthenosphere?

A
Temperatures are cool.
B
Consistency is solid.
C
Thickness is less than crust.
D
Pressure is higher than crust.

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