Please help with all of the following questions, thank you. 1) All of the follow
ID: 155110 • Letter: P
Question
Please help with all of the following questions, thank you.
1) All of the following radiometric dating methods are useful for rocks older than 100,000 years EXCEPT:
A) uranium-lead dating.
B)potassium-argon dating.
C)rubidium-strontium dating.
D)carbon-14 dating.
2) A rock or mineral becomes a closed system when it completely cools and crystallizes. Which of the following rocks would become a closed system most rapidly?
A)Granite
B)Basalt
C) Gneiss
D)Schist
3) The chain of volcanoes along the west coast of South America (the Andes Mountains) exist because:
A) the Pacific Plate is sliding past the South American Plate and heading toward the northwest
B) the Pacific Plate is rifting apart from the South American Plate.
C) an oceanic plate is subducting under the western edge of the South American Plate.
D) basalt is pushing up through the trench that parallels the west coast of South America.
4) Pick out the FALSE statement. According to present plate tectonics theory:
A) plates move at speeds of a few centimeters per year.
B) a continental plate will subduct under an oceanic plate when the two converge.
C) plates are composed of the crust and the uppermost part of the mantle.
D) plates diverge at mid-ocean ridges.
5) The huge trough down the center of the mid-ocean ridge is where:
A) the Hawaiian Island chain formed.
B) two continental plates converge.
C) molten basalt subducts back into the Earth.
D) The actual divergent plate boundary is located.
6) The portion of the Earth's interior that flows and is partially responsible for the motion of tectonic plates is known as the:
A)lithosphere
B)asthenosphere.
C)mesosphere
D) inner core.
7) Old, cold lithosphere is more dense than which of the following?
A) The underlying warm asthenosphere
B) The continental lithosphere
C) Younger oceanic lithosphere
D) All of the Above
8) Of the following orogenic belts, which is still forming and growing today?
A) Appalachian
B)Urals
C)Caledonides
D)Himalaya
9) What evidence suggests that the Rocky Mountains were formed by plate convergence?
A) Strike slip faults are common.
B)Continental basalts are common.
C) Giant thrusts of sedimentary rock are common.
D) Ophiolites are common.
10) Which of the following statements concerning the most recent ice age is NOT true?
A) We now live in a warm interglacial period of an ice age.
B) In some places in North America, ice was 2.5 miles thick during the last major ice advance.
C) The last glacial advance occurred during the Pleistocene Epoch that ended about 10,000 years ago.
D) About 20,000 years ago, ice covered roughly 50% of the Earth's land surface.
Explanation / Answer
1) All of the following radiometric dating methods are useful for rocks older than 100,000 years EXCEPT:
A) uranium-lead dating.
B)potassium-argon dating.
C)rubidium-strontium dating.
D)carbon-14 dating.
Answer is option "D" .
Because carbon-14 dating is used to determining the age of certain archeological artifacts of a biological origin up to about 50,000 years old.
2) A rock or mineral becomes a closed system when it completely cools and crystallizes. Which of the following rocks would become a closed system most rapidly?
A)Granite
B)Basalt
C) Gneiss
D)Schist
Correct option is "B".
Basalt is a common extrusive igneous rock. The mineral crystals in igneous rocks form a closed system.
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