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Title: Rocks: Mineral Mixtures


1
Chapter 4
Rocks Mineral Mixtures
Preview
CRCT Preparation
2
CRCT Preparation
Chapter 4
1. Igneous rock forms when A magma cools and
hardens. B minerals crystallize out of water. C
heat and pressure change the composition and
texture of a rock. D natural cement binds rock
fragments together.
3
CRCT Preparation
Chapter 4
1. Igneous rock forms when A magma cools and
hardens. B minerals crystallize out of water. C
heat and pressure change the composition and
texture of a rock. D natural cement binds rock
fragments together.
4
CRCT Preparation
Chapter 4
Use the diagram to answer question 2.
2. Which of the following processes occurs at
point C on the diagram of the rock cycle? A
deposition B uplift C heat and pressure D melting
and cooling
5
CRCT Preparation
Chapter 4
Use the diagram to answer question 2.
2. Which of the following processes occurs at
point C on the diagram of the rock cycle? A
deposition B uplift C heat and pressure D melting
and cooling
6
CRCT Preparation
Chapter 4
3. Volcanic activity on Earths surface most
likely results in the formation of which of the
following types of rock? A intrusive igneous
rock B extrusive igneous rock C clastic
sedimentary rock D chemical sedimentary rock
7
CRCT Preparation
Chapter 4
3. Volcanic activity on Earths surface most
likely results in the formation of which of the
following types of rock? A intrusive igneous
rock B extrusive igneous rock C clastic
sedimentary rock D chemical sedimentary rock
8
CRCT Preparation
Chapter 4
4. How does clastic sedimentary rock form? A Rock
fragments are cemented together by a mineral such
as calcite or quartz. B Dissolved minerals
crystallize out of solution in water to form
solid minerals. C Heat and pressure turn
partially decomposed plant material into rock. D
Skeletons of sea animals that collected on the
ocean floor are cemented together.
9
CRCT Preparation
Chapter 4
4. How does clastic sedimentary rock form? A Rock
fragments are cemented together by a mineral such
as calcite or quartz. B Dissolved minerals
crystallize out of solution in water to form
solid minerals. C Heat and pressure turn
partially decomposed plant material into rock. D
Skeletons of sea animals that collected on the
ocean floor are cemented together.
10
CRCT Preparation
Chapter 4
5. Stratification occurs as the result of which
of the following processes? A the cooling and
solidification of magma B the partial or complete
melting of rock C the deformation of rock by heat
and pressure D the deposition of sediments in a
body of water
11
CRCT Preparation
Chapter 4
5. Stratification occurs as the result of which
of the following processes? A the cooling and
solidification of magma B the partial or complete
melting of rock C the deformation of rock by heat
and pressure D the deposition of sediments in a
body of water
12
CRCT Preparation
Chapter 4
Use the table to answer question 6.
6. Which of the four rock samples in the table
most likely formed in the process of regional
metamorphism? A Sample A B Sample B C Sample C D
Sample D
13
CRCT Preparation
Chapter 4
Use the table to answer question 6.
6. Which of the four rock samples in the table
most likely formed in the process of regional
metamorphism? A Sample A B Sample B C Sample C D
Sample D
14
CRCT Preparation
Chapter 4
7. Buried rock is exposed at Earths surface by
the combination of which two processes? A
weathering and deposition B uplift and erosion C
erosion and deposition D deposition and uplift
15
CRCT Preparation
Chapter 4
7. Buried rock is exposed at Earths surface by
the combination of which two processes? A
weathering and deposition B uplift and erosion C
erosion and deposition D deposition and uplift
16
CRCT Preparation
Chapter 4
8. Which of the following processes forms
sediment? A deposition B weathering C erosion D
compaction and cementation
17
CRCT Preparation
Chapter 4
8. Which of the following processes forms
sediment? A deposition B weathering C erosion D
compaction and cementation
18
CRCT Preparation
Chapter 4
9. Rock in which the composition and texture of
the rock have been changed by heat and pressure
is called A felsic rock. B mafic rock. C igneous
rock. D metamorphic rock.
19
CRCT Preparation
Chapter 4
9. Rock in which the composition and texture of
the rock have been changed by heat and pressure
is called A felsic rock. B mafic rock. C igneous
rock. D metamorphic rock.
20
CRCT Preparation
Chapter 4
10. Kaolin is a white claystone that is composed
of kaolinite and other minerals. Over 8 million
tons of kaolin are mined in Georgia each year.
Kaolin is used as a coating on glossy paper. It
is also used in the production of ceramics,
paints, plastics, and rubber. What type of rock
is kaolin? How is kaolin rock formed?
21
CRCT Preparation
Chapter 4
  • 10. Answer - Full-credit answers should include
    the following points
  • Kaolin is a clastic sedimentary rock.
  • Kaolin is formed when kaolinite and other
    mineral particles become cemented together.
  • The particles in kaolin were cemented together
    by a mineral such as calcite or quartz.

22
CRCT Preparation
Chapter 4
11. Tim is studying the geology of Georgia. He
discovers that the Lexington Oglesby Blue Granite
Belt lies beneath Elberton County in Georgia.
This deposit contains Elberton granite, also
called Georgia Gray because of its color. The
stone consists of coarse light gray and dark gray
grains. Elberton granite can be seen all over
the United States, in buildings, monuments, and
gravestones. What was the process that formed
Elberton granite? What can you infer about the
properties of this stone from its uses?
23
CRCT Preparation
Chapter 4
  • 11. Answer - Full-credit answers should include
    the following points
  • Elberton granite is an igneous rock, which
    formed when melted magma cooled.
  • It was most likely formed by an intrusion of
    magma, which cooled slowly below Earths surface
    to create the coarse-grained rock.
  • Because the rock is used for buildings and
    monuments, it must be strong and durable outdoors.
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