GO125 Unit 4 Quiz
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Geology
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Feb 20, 2024
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GO125
Unit 4: Quiz 4
Unit 4: Quiz 4
Quiz Instructions
Note: this is a timed quiz. You may check the remaining time you have at any point while taking the quiz by pressing the keyboard combination SHIFT, ALT, and T... Again: SHIFT, ALT, and T...
Question 1 2 pts
If all of the following rocks were to completely melt and reach the same final temperature, which would produce magma with highest viscosity?
Group of answer choices
basalt
gabbro
andesite
diorite
rhyolite
Question 2 2 pts
Most rifting occurs at spreading centers ________.
Group of answer choices
in the interior of continents
and subduction zones
located below sea level
on the margins of continents
and hot spots
Question 3 2 pts
Rock may melt by ________.
Group of answer choices
lowering the pressure on it
raising its temperature
increasing its water content
All of these choices are correct.
Question 4 2 pts
Mineral growth in magmas at the surface with temperatures around 1,000 to 1,200°C occurs in the following way
Group of answer choices
Iron and magnesium will link up with aluminum and the silicon-oxygen tetrahedron as magma temperature decreases to sequentially form four distinct and discontinuous families of minerals—olivine, pyroxene, amphibole, and biotite mica.
Calcium will combine with aluminum and the silicon-oxygen tetrahedron to begin forming the plagioclase feldspar family, a continuous and gradational series of minerals.
Both of these are correct.
None of these choices are correct.
Question 5 2 pts
What erupts in a geyser?
Group of answer choices
superheated water and steam
liquid hydrogen
magma
oil and natural gas
All of these choices are correct.
Question 6 2 pts
Violent causes of death from volcanic eruptions include ________.
Group of answer choices
pyroclastic flows
tsunami
lahars
poison gases
All of these choices are correct.
Question 7 2 pts
Active volcanoes today in Oregon and Washington, including Mt. St. Helens, result from ________.
Group of answer choices
heat generated by friction on the San Andreas Fault
the subduction of the Juan de Fuca Plate beneath North America
the subduction of the Pacific Plate beneath North America
spreading of the Juan de Fuca Ridge
continent-continent collision
Question 8 2 pts
The vulcanian eruption of Eyajafjallajokull in southern Iceland in 2010 resulted from ________.
Group of answer choices
an increase in subduction
glacial meltwater pouring into the magma chamber
temperature of the magma increasing
an earthquake
Question 9 2 pts
At Lake Nyos in 1986, a gas cloud wiped out all nearby plant and animal life.
Group of answer choices
True
False
Question 10 2 pts
On 8 May 1902, a massive eruption of ________ killed 30,000 people in the town of St. Pierre.
Group of answer choices
Mont Pelée, Martinique,
Vesuvius, Italy,
Krakatau, Indonesia,
Mt. St. Helens, Washington,
Nevado Del Ruiz, Colombia,
Question 11 2 pts
Land subsidence is worsened by the cessation of groundwater pumping, because the additional water that is retained underground weakens the rock,
making it subside more easily.
Group of answer choices
True
False
Question 12 2 pts
There are certain times when a hill containing clay minerals is weaker than at other times, and then gravity has a better chance of provoking a slope failure.
Group of answer choices
True
False
Question 13 2 pts
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Clays are the least abundant of all sediments.
Group of answer choices
True
False
Question 14 2 pts
The most likely explanation for how highly fluidized rock flows occur is that ________.
Group of answer choices
the jostling of fragments in the flowing mass provides energy that propagates as trapped sound waves and supports the particles, thus fluidizing the mass (acoustic fluidization)
water lubricates the material, allowing it to flow (hydro fluidization)
steam lubricates the material, allowing it to flow (aqueous fluidization)
the flowing mass rides on a cushion of compressed air (jetting)
heat generated by friction melts material within the mass, allowing it to flow (thermal fluidization)
Question 15 2 pts
Quick clays are among the least mobile of all deposits and so provide favorable building sites.
Group of answer choices
True
False