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INTERLUDE A: Rock Groups MULTIPLE CHOICE 1. A(n) ________ material is held together, solid, and must be broken apart to separate it into smaller pieces. a. unconsolidated c. coherent b. paved d. buttressed ANS: C DIF: Easy REF: A.2 OBJ: Understand the geologic definition of rock. MSC: Remembering 2. A(n) ________ of minerals forms a rock. a. compilation c. mass b. aggregate d. assembly ANS: B DIF: Easy REF: A.2 OBJ: Understand the geologic definition of rock. MSC: Remembering 3. Rocks are ________ and thus not man -made. a. coherent c. rare b. synthetic d. natural ANS: D DIF: Moderate REF: A.2 OBJ: Understand the geologic definition of rock. MSC: Remembering 4. A pile of unconsolidated sediment is NOT ________ and therefore NOT a rock. a. coherent c. natural b. aggregated d. solid ANS: A DIF: Easy REF: A.2 OBJ: Understand the geologic definition of rock. MSC: Understanding 5. A piece of concrete from a driveway is NOT considered a rock because it ________. a. is made of one mineral c. is unconsolidated b. does not contain minerals d. is man -made ANS: D DIF: Moderate REF: A.2 OBJ: Understand the geologic definition of rock. MSC: Understanding 6. Which one of the pictures does NOT show (a) rock(s)? Figure A Figure B Figure C Figure D a. Figure A c. Figure C b. Figure B d. Figure D ANS: D DIF: Easy REF: A.2 OBJ: Understand the geologic definition of rock. MSC: Applying 7. Which of the following describes a rock? a. a pile of damp sand still holding the form of a bucket b. a collection of crystals that fit together like puzzle pieces c. cobblestones cemented together to form a walkway d. a layer of mud at the bottom of a dry river bed ANS: B DIF: Moderate REF: A.2 OBJ: Understand the geologic definition of rock. MSC: Applying 8. What is the difference between a rock that is cemented and a rock that is crystalline? a. A rock that is cemented contains rounded grains that are held together by cement, whereas a crystalline rock contains angular grains held together by cement. b. Crystalline rocks contain minerals, while cemented rocks contain rock fragments; both are held together by static forces between grains. c. Minerals are held together as interlocking pieces in a cemented rock, whereas grains are held together by minerals precipitated in pore spaces in a crystalline rock. d. Minerals are held together as interlocking pieces in a crystalline rock, whereas in a cemented rock the grains do not fit together like puzzle pieces and instead are held together by cement. ANS: D DIF: Moderate REF: A.2 OBJ: Understand the geologic definition of rock. MSC: Analyzing 9. Which is a characteristic used to classify a ro ck? a. mineral stability c. water content b. rock texture d. degree of weathering ANS: B DIF: Easy REF: A.3 OBJ: Understand the basis that geologists use to classify rock into three classes. MSC: Remembering 10. Igneous rocks form from ________. a. heat and pressure applied to a rock b. precipitation of minerals out of a solution c. sediments cemented together d. molten rock cooling and forming crystals ANS: D DIF: Easy REF: A.3 OBJ: Understand the basis that geologists use to cla ssify rock into three classes. MSC: Remembering 11. Which type of rock is formed by precipitation of minerals from a solution? a. metamorphic c. sedimentary b. glassy d. igneous ANS: C DIF: Moderate REF: A.3 OBJ: Understand the basis that geologists use to classify rock into three classes. MSC: Remembering 12. Composition describes the ________.
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