Download Rocks and Minerals Midterm Rev

Name_______________
Date_____________
Rock and Mineral Review
Midterm Review
E-Science
Science Department
1 Base your answer to the following question on the drawings of six sedimentary rocks labeled A
through F.
Most of the rocks shown were formed by
1) volcanic eruptions and crystallization
2) compaction and/or cementation
3) heat and pressure
4) melting and/or solidification
2 Which type of rock is most likely to contain
fossils?
4 Igneous, sedimentary, and metamorphic rocks are
usually composed of
1) granite
1) intergrown crystals
2) gneiss
2) fossils
3) shale
3) minerals
4) metaconglomerate
4) sediments
3 Base your answer to the following question on the
diagram below.
5 Which mineral has a metallic luster, a black streak,
and is an ore of iron?
1) galena
2) magnetite
3) pyroxene
4) graphite
6 Which mineral will scratch glass (hardness = 5.5),
but not pyrite?
Which two processes formed this rock?
1) gypsum
1) folding and faulting
2) fluorite
2) melting and solidification
3) orthoclase
3) compaction and cementation
4) quartz
4) heating and application of pressure
Rock and Mineral Review
7 The profile below shows the average diameter of sediment that was sorted and deposited in specific
areas A, B, C, and D by a stream entering an ocean.
As compaction and cementation of these sediments eventually occur, which area will become siltstone?
1) A
2) B
3) C
4) D
8 Base your answer to the following question on the
photograph below. The photograph shows several
broken samples of the same colorless mineral.
9 Which rock most likely formed as a result of
biologic processes?
1) granite
2) basalt
3) sandstone
4) limestone
10 When granite melts and then solidifies, it becomes
1) a sedimentary rock
2) an igneous rock
3) a metamorphic rock
Which physical property of this mineral is most easily
seen in the photograph?
1) fracture
4) sediments
11 Compared to felsic igneous rocks, mafic igneous
rocks contain greater amounts of
2) hardness
1) white quartz
3) streak
2) aluminum
4) cleavage
3) pink feldspar
4) iron
Rock and Mineral Review
12 The diagrams below represent fractured samples of
four minerals.
14 Which object is the best model of the shape of a
silicon-oxygen structural unit?
1)
2)
Which mineral property is best illustrated by the
samples?
3)
1) hardness
2) streak
4)
3) cleavage
4) density
13 The diagram below shows a broken crystal of the
mineral halite
The shape of the halite crystal is a direct result of the
1) internal arrangement of the atoms in the crystal
2) emperature at which the crystal formed
3) type of surface on which the crystal formed
4) stream erosion that changed the crystal
15 The photograph below shows an igneous rock.
What is the origin and rate of formation of this rock?
1) plutonic with slow cooling
2) plutonic with rapid cooling
3) volcanic with slow cooling
4) volcanic with rapid cooling
Rock and Mineral Review
16 The diagrams below represent four rock samples.
Which rock was formed by rapid cooling in a
volcanic lava flow? [The diagrams are not to
scale.]
18 The picture below shows the igneous rock
obsidian.
1)
2)
The obsidian's glassy texture indicates that it formed
from a magma that cooled
1) slowly, deep below Earth's surface
3)
2) slowly, on Earth's surface
3) quickly, deep below Earth's surface
4) quickly, on Earth's surface
4)
19 Which granite sample most likely formed from
magma that cooled and solidified at the slowest
rate?
1)
17 The rock shown below has a foliated texture and
contains the minerals amphibole, quartz, and
feldspar arranged in coarse-grained bands.
2)
3)
Which rock is shown?
1) slate
2) dunite
3) gneiss
4) quartzite
4)
Rock and Mineral Review
Base your answer to questions 20 and 21 on the diagrams below which represents the same rock material at
five stages of development. The graph below shows the temperature and depth of burial at which stages A
through D develop Stage E has intentionally been omitted from the graph.
20 In the simple rock-cycle diagram, which processes along path X would change the schist (stage C)
directly into a pile of sediments (stage A)?
1) uplift, weathering, and erosion of the schist
2) cementing of sediment grains followed by compaction
3) melting of the schist followed by cooling
4) heat and/or pressure applied to the schist
Rock and Mineral Review
21 Which graph correctly shows where magma would begin to crystallize into granite (stage E)?
1)
3)
2)
4)
22 Base your answer to the following question on the geologic cross section below. Location A is within
the metamorphic rock.
The metamorphic rock at location A is most likely
1) marble
2) quartzite
3) phyllite
4) slate
Rock and Mineral Review
23 The diagram below shows four rock samples.
Which sample best shows the physical properties normally associated with regional metamorphism?
1) A
2) B
3) C
4) D
24 The cartoon below presents a humorous look at
history.
25 The geologic cross section below shows limestone
that was intruded. Part of the limestone (zone A)
was heated intensely but was not melted.
Which type of rock most likely formed in zone A?
1) gneiss
2) slate
3) marble
4) obsidian
What kind of rocks does the complaining rock collector
want?
1) felsic volcanic rocks
2) clastic sedimentary rocks
3) inorganic sedimentary rocks
4) regionally metamorphosed rocks
Answer Key
Rocks and Minerals Review
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