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FREE AND STUDY GAMES ABOUT GEO LECTURE EXAM 2
Actual Qs and Ans Expert-Verified Explanation
This Exam contains:
-Guarantee passing score -106 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: (chart) If shale is buried to a depth of 20 km and the temperature is raised to 450°C, which mineral would form according to the image above?
Answer:
Kyanite Question 2: What is the term used to describe increasing temperature with increasing depth in the Earth?
Answer:
geothermal gradient
Question 3: Which of the following is the parent rock of quartzite?
Answer:
Sandstone Question 4: ________ is a felsic igneous rock with a meringue-like vesicular texture, consisting of very small holes, created by small shards of volcanic glass
Answer:
pumice
Question 5: A ________ is a solid, naturally occurring, cohesive substance composed of minerals or mineral-like materials
Answer:
rock
Question 6: What is a volatile?
Answer:
Materials that vaporize at surface pressures
Question 7: Which statement accurately describes a pyroclastic flow?
Answer:
Pyroclastic flows, which consist of incandescent ash and lava fragments, can reach many miles away from their sources because they are nearly frictionless and are driven by gravity
Question 8: Which agent of metamorphism is most important, and why?
Answer:
Heat is the most important agent of metamorphism because it provides the energy necessary for chemical reactions to occur within the rock Question 9: Which of the following can be a product of a composite volcano eruption? CHOOSE
ALL THAT APPLY.
Answer:
all of the above
Question 10: ________ is defined as a mineral's resistance to scratching
Answer:
hardness Question 11: What is the average increase in temperature along the geothermal gradient in the upper crust?
Answer:
25°C per km
Question 12: ________ is molten rock that is below the Earth's surface and retains most of its volcanic gases
Answer:
magma Question 13: ________ will occur when continental collisions occur, thickening the crust and forcing some rocks to a depth where melting can take place.
Answer:
partial melting Question 14: (image of volcano)Based on the volcanic type and construction of the flanks, what assumptions can you make about the viscosity of the lava?
Answer:
lava is low viscosity
Question 15: What is a lahar?
Answer:
a mudflow of volcanic debris saturated with water
Question 16: How does magmatic differentiation occur?
Answer:
As the mafic magma cools, firstly such minerals as pyroxene and olivine crystallize, not quartz and feldspar. Therefore, the remaining melt becomes richer in silica and closer to the felsic magma
Question 17: ________ is a material's resistance to flowing
Answer:
Viscosity Question 18: Which of the following statements best describes the relationship between pressure and melting point in the Earth's Interior?
Answer:
Higher melting points are determined by higher pressures.
Question 19: ________ refers to a mineral's intensity and quality of reflected light.
Answer:
luster
Question 20: Which of the following is the hardest known natural substance?
Answer:
diamond Question 21: Most marine organisms produce the mineral substance ________, which will later become limestone
Answer:
calcite (CaCO3)
Question 22: A rock can be composed of almost entirely one mineral.
Answer:
true
Question 23: What role does water play in the formation of magma?
Answer:
The addition of water to rock allows the rock to melt at lower temperatures than if it had not been added Question 24: ________ is the process by which a rock changes form or mineral content as a result of environmental changes such as heat and pressure
Answer:
metamorphism Question 25: Which igneous texture has visible crystals that are a few millimeters across?
Answer:
phaneritic Question 26: The most abundant minerals found in granitic (felsic) igneous rocks include
______. CHOOSE ALL THAT APPLY
Answer:
quartz and potassium feldspar
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