esci 61-80
Terms
undefined, object
copy deck
-
61. Most detrital sedimentary rocks are formed from quartz and clay.
a. True
b. False
- true
-
62. Obsidian exhibits this type of texture.
a. aphanitic/b. glassy
c. porphyritic/d. phaneritic
e. pyroclastic
- glassy
-
63. Rocks that contain crystals that r roughly equal in size (like granite) and can be identified with the unaided eye are generally said to exhibit this type of texture.
a. fine grained/b. glassy
c. porphyritic/d. coarse grained/ e. pyroclastic - coarse grained
-
64. The texture of an igneous rock ____
a. is controlled by the composition of magma
d. is caused by leaching
e. is very much dependent on the rock’s cooling time
- is very much dependent on the rock’s cooling time
-
65. Igneous rocks are formed _____
a. by the weathering of pre-existing rocks
b. by changes in mineral composition
c. at great depth within Earth
d. by the crystallization of molten rock (magma)
- by the crystallization of molten rock (magma)
-
66. Sedimentary rocks ___
a. may contain fossils
b. hold import clues to Earth’s history
c. are often layered
d. may be economically important
e. all of these - all of these
-
67. Metamorphism may result from
a. heat
b. pressure
c. chemical action
d. any or all of these
e. only heat and pressure - all of these
-
68. Many metamorphic rock __
a. are extremely fossiliferous
b. have a linear orientation of minerals
c. are unaltered sedimentary rocks
d. all of these
e. none of these - have a linear orientation of minerals
-
69. Which of the following materials below is considered a very good aquitard?
a. coarse sand/b. fine sand
c. soil/d. clay
e. none of the above. - clay
-
70. When certain mineral crystals recrystallize w/orientation..the rock is said to exhibit ___
a. striations/b. foliation
c. aurole/d. all of these
e. none of these - foliation
-
71. The common rock produced by the metamorphism of shale is
a. marble/b. mica schist
c. slate/d. gneiss
e. hornfels
- slate
-
72. This metamorphic rock listed below is composed of alternating bands of light and dark silicate minerals.
a. phyllite/b. mica schist
C. guartzite/d. gneiss
e. marble - gneiss
-
73. Starting with the energy from the sun, what are the general stages/steps of the hydrologic cycle?
a. evapor, precip, conden, runoff/infiltration
c. evapor, conden, precip, runoff/infiltration
d. evapor,
runoff/infiltration, precip, conden< - evaporation, condensation, precipitation, runoff/infiltration
-
74. Which river features are generally associated with younger streams?
a. rapids/b. waterfalls
c. v-shaped channels
d. small/narrow floodplain
e. all of the above - all of the above
-
75. Sidewalks and roadways are very impermeable surfaces.
a. True
b. False
- true
-
76. Particle size (texture) and fragment shape (angular, rounded) are the primary basis for distinguishing among various detrital sedimentary rocks
a. True
b. False
- true
-
77. New igneous rock is formed at the mid-ocean ridges as magma rises and cools.
a. True
b. False - true
-
78. Metamorphism only alters sedimentary rocks.
a. True
b. False
- false
-
79. All silicate minerals contain the elements
a. silicon and iron
b. silicon and magnesium
c. silicon and calcium
d. silicon and sodium
e. silicon and oxygen
- silicon and oxygen
-
80. The tendency of minerals to break along smooth flat surfaces is called
a. streak/b. fracture
c. cleavage/d. conchoidal
e. polyhedral - cleavage