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Transcript of < BackNext >PreviewMain Minerals of the Earth’s Crust Chapter 3 Preview CRCT Preparation.
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Minerals of the Earth’s CrustChapter 3
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CRCT Preparation
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1. Which of the following definitions best describes a mineral?
A a substance that cannot be separated or broken down into simpler substances by chemical means
B a substance made up of atoms of two or more different elements joined by chemical bonds
C a naturally formed, inorganic solid that has a definite crystalline structure
D a solid whose atoms, ions, or molecules are arranged in a definite pattern
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1. Which of the following definitions best describes a mineral?
A a substance that cannot be separated or broken down into simpler substances by chemical means
B a substance made up of atoms of two or more different elements joined by chemical bonds
C a naturally formed, inorganic solid that has a definite crystalline structure
D a solid whose atoms, ions, or molecules are arranged in a definite pattern
![Page 4: < BackNext >PreviewMain Minerals of the Earth’s Crust Chapter 3 Preview CRCT Preparation.](https://reader035.fdocuments.in/reader035/viewer/2022062500/5697bfda1a28abf838cb0207/html5/thumbnails/4.jpg)
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2. Which of the following substances is a mineral?
A coal, which forms from the remains of living things
B fluorite, which is a crystalline solid with the chemical formula CaF2
C obsidian, which is a volcanic glass and is not crystalline
D brass, which is a metal that is made by humans
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2. Which of the following substances is a mineral?
A coal, which forms from the remains of living things
B fluorite, which is a crystalline solid with the chemical formula CaF2
C obsidian, which is a volcanic glass and is not crystalline
D brass, which is a metal that is made by humans
![Page 6: < BackNext >PreviewMain Minerals of the Earth’s Crust Chapter 3 Preview CRCT Preparation.](https://reader035.fdocuments.in/reader035/viewer/2022062500/5697bfda1a28abf838cb0207/html5/thumbnails/6.jpg)
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3. Minerals that contain one of more elements combined with silicon and oxygen are called
A sulfides.
B silicates.
C oxides.
D halides.
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3. Minerals that contain one of more elements combined with silicon and oxygen are called
A sulfides.
B silicates.
C oxides.
D halides.
![Page 8: < BackNext >PreviewMain Minerals of the Earth’s Crust Chapter 3 Preview CRCT Preparation.](https://reader035.fdocuments.in/reader035/viewer/2022062500/5697bfda1a28abf838cb0207/html5/thumbnails/8.jpg)
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Use the table to answer question 4.
4. On the Mohs hardness scale, which of the following minerals is harder than topaz?
A apatite
B talc
C corundum
D quartz
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Use the table to answer question 4.
4. On the Mohs hardness scale, which of the following minerals is harder than topaz?
A apatite
B talc
C corundum
D quartz
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5. Which of the following is a nonsilicate mineral?
A orthoclase, KAlSi3O8
B talc, Mg3Si4O10(OH)2
C almandine, Fe3Al2(SiO4)3
D magnetite, Fe3O4
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5. Which of the following is a nonsilicate mineral?
A orthoclase, KAlSi3O8
B talc, Mg3Si4O10(OH)2
C almandine, Fe3Al2(SiO4)3
D magnetite, Fe3O4
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6. Which of the following is NOT a way to reduce the impact of mining?
A recycling products that are made from minerals
B reducing the use of minerals to make products
C reclaiming land that has been disturbed by mining
D inventing new things to make out of minerals
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6. Which of the following is NOT a way to reduce the impact of mining?
A recycling products that are made from minerals
B reducing the use of minerals to make products
C reclaiming land that has been disturbed by mining
D inventing new things to make out of minerals
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7. Which of the following minerals can be identified by taste?
A magnetite
B fluorite
C calcite
D halite
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7. Which of the following minerals can be identified by taste?
A magnetite
B fluorite
C calcite
D halite
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8. Minerals such as gypsum and halite form
A from hot water solutions.
B when a rock is altered by metamorphism.
C when bodies of salt water evaporate.
D from the cooling of magma that rises upward through the crust.
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8. Minerals such as gypsum and halite form
A from hot water solutions.
B when a rock is altered by metamorphism.
C when bodies of salt water evaporate.
D from the cooling of magma that rises upward through the crust.
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9. Why are gemstones valuable?
A They can be used in concrete and to build buildings.
B They are good conductors of heat and electricity.
C They are beautiful and rare.
D They taste good.
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9. Why are gemstones valuable?
A They can be used in concrete and to build buildings.
B They are good conductors of heat and electricity.
C They are beautiful and rare.
D They taste good.
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Use the table to answer Question 10.
10. Which of the following terms correctly completes the entry in the table?
A sulfate
B oxide
C carbonate
D halide
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Use the table to answer Question 10.
10. Which of the following terms correctly completes the entry in the table?
A sulfate
B oxide
C carbonate
D halide
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11. What is the difference between an element, a mineral, and a rock?
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11. Answer - Full-credit answers should include the following points:
• Elements are pure substances that cannot be broken down into smaller substances by ordinary chemical means.
• Some elements, such as gold, aluminum, or iron, can be minerals because they are solid, crystalline, and naturally formed by inorganic processes.
• All minerals are made of one or more elements.
• Rocks are made of one or more minerals.
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12. A chemical analysis of a mineral sample shows its chemical composition as SiO2. In what group of minerals does this sample belong? How do you know?
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12. Answer - Full-credit answers should include the following points:
• The sample is a silicate mineral.
• The sample is made of silicon and oxygen, which are found in all silicate minerals.
• Non-silicate minerals do not contain combinations of silicon and oxygen.