1. The interior of Earth consists almost entirely of __________ rock solid molte
ID: 286483 • Letter: 1
Question
1. The interior of Earth consists almost entirely of __________ rock
solid
molten
sedimentary
felsic
2. Why is the outer core the only layer in Earth that is molten?
The pressure decreases within Earth, thus allowing iron to melt.
The pressure increases within Earth, thus allowing iron to melt.
The temperature is high enough but pressure low enough to melt iron.
The temperature is high enough but pressure low enough to melt olivine.
3. An important first step in mitigating volcanic hazards at a volcano is to __________ .
compile a hazard assessment map
try to divert or stop active volcanic hazards
evacuate people at the first sign of trouble
measure heat flow in the region
6.
Granite, a course-grained, felsic intrusive igneous rock is most similar in mineral composition to __________ , which is a fine-grained, felsic extrusive equivalent.
andesite
basalt
gabbro
rhyolite
7.
An irregular-shaped and bloblike igneous rock body that cooled beneath the surface of Earth is a __________.
dike
pluton
sill
laccolith
8.
Which type of magma has the greatest silica content?
felsic
intermediate
mafic
ultramafic
9.
Lithification occurs
in the shallow subsurface.
at the surface of Earth.
deep under the ground
high in the mountains
QUESTION 10
If a geologist found preserved polygonal cracks in a sedimentary rock, he or she could conclude that the environment in which they formed
was once covered in wet mud.
was once covered by a glacier.
has been subjected to a major climate change event.
was the site of a mass extinction event.
QUESTION 11
How are chalk and chert different?
They have different grain sizes.
They are made of different source materials.
Chalk is terrestrial; chert is marine.
Chalk is biochemical; chert is chemical.
QUESTION 12
Clastic sedimentary rocks are primarily classified on the basis of
grain size.
degree of sorting.
angularity.
mineral composition.
QUESTION 13
Lithification, the process by which sediments are turned into sedimentary rocks, includes
erosion and transportation
transportation and cementation
erosion and deposition
compaction and cementation
QUESTION 14
Compaction and cementation of grains occur during
erosion
lithification
transport
weathering
QUESTION 15
Diagenesis refers to
weathering at the outcrop.
lithification.
transportation.
deposition.
the development of layering within sedimentary rocks.
the act of deposition of sediment that will ultimately form sedimentary rock.
physical and chemical alterations, including compaction and cementation, that occur as sediment is transformed into rock.
the natural process of separating sediment by grain size.
Grains become rounded primarily during
Grains become rounded primarily during
weathering at the outcrop.
lithification.
transportation.
deposition.
solid
molten
sedimentary
felsic
2. Why is the outer core the only layer in Earth that is molten?
The pressure decreases within Earth, thus allowing iron to melt.
The pressure increases within Earth, thus allowing iron to melt.
The temperature is high enough but pressure low enough to melt iron.
The temperature is high enough but pressure low enough to melt olivine.
Explanation / Answer
1.
Answer: Solid
Explanation: Most of the interior of the Earth is filled with the solid material. The lower mantle and the inner core are composed by the solid material, whereas the upper mantle and outer core is in liquid form.
2.
Answer: The temperature is high enough but pressure low enough to melt iron.
Explanation: The temperature of the outer core is very high and has less pressure that leads to melt iron.
3.
Answer: Evacuate people at the first sign of trouble.
6.
Answer: Rhyolite
7.
Answer: Pluton
8.
Answer: Felsic
9.
Answer: In the shallow surface
10.
Answer: Was once covered in wet mud.
11.
Answer: They have different grain sizes.
12.
Answer: Grain size
13.
Answer: Compaction and cementation
14.
Answer: Lithification
15.
Answer: Lithification
16. Grains become rounded primarily during
Answer: Lithification
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