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1. The passage suggests that which two geological concepts were crucial to the development of Harry Hess’s formulation of the plate tectonics theory?

A. Seafloor spreading and subduction ~ Incorrect not mentioned.

B. Subduction and continental drift ~ Incorrect not mentioned.

C. Seafloor spreading and continental drift ~ Correct, Refer to the line "In 1962 Hess published a paper that combined the evidence for continental drift with his own work on seafloor spreading to produce an argument for the theory".

D. Magnetic resonance and continental drift ~ Incorrect not mentioned.

E. Mantle theory and seafloor spreading ~ Incorrect not mentioned.


2. Which of the following would make the most appropriate title for this passage?

A. At the Heart of the Matter: The Quest to Determine the Composition of the Earth’s Core ~ Incorrect, passage is to finding out a a workable big-picture theory for the basic dynamics of the earth sciences

B. World’s Turning: The Perplexing Story of the Earth’s Magnetic Field ~ Incorrect, magnetic field is not discussed in detail.

C. Tectonic Shift: The Plate Tectonics Revolution in the Earth Sciences ~ Correct, author begins the passage that scientist were unable to put forth a workable big-picture theory for the basic dynamics of the earth sciences. One earlier theory of earth as static was refuted due to flaw and later Plate tectonic theory was produced which was at first resisted by traditional geologists, but since the ability of plate tectonics theory to explain geological phenomena was too powerful it cannot be denied.

D. Harry Hess: A Man, a Planet, a Theory ~ Incorrect, passage is about the theory of plate tectonics theory of Harry Hess and not about him as an individual.

E. The Transformation of Heuristic Models in Geology, Oceanography, and Paleontology ~ Incorrect the heuristic models are not explained.

3. The author’s attitude toward the plate tectonics theory can best be characterized as


A. strong disagreement ~ Incorrect, Author is supporting the theory.

B. lingering doubt ~ Author is supporting the theory and not doubting it.

C. ambivalent ~ Author is not showing mixed feeling, he/she strongly agrees that the theory is correct.

D. supportive, but reserved ~ Author is not reserved about the theory.

E. strong agreement ~ Correct, refer to the line "The ability of plate tectonics to explain geological phenomena, however, was too powerful to be denied."

4. Geologists believe that the Andes mountain chain along the Pacific coast of South America was created by the collision of the oceanic Nazca plate with the continental South American plate; this type of plate boundary is known as a.

A. Convergent boundary ~ Correct, refer to the line "sometimes they press into each other at convergent boundaries, in which case one plate is subducted under the other, generally creating mountains in the process."

B. Transform boundary ~ Incorrect not mentioned.

C. Subduction boundary~ Incorrect not mentioned.

D. Divergent boundary ~ Incorrect not mentioned.

E. Tectonic boundary ~ Incorrect not mentioned.

5. The passage suggests that the plate tectonics theory can help explain all of the following phenomena, EXCEPT.

A. The shape and location of some continents ~ Incorrect, refer to the line "continents such as South America and Africa looked suspiciously like they had fit together at some time in the past."

B. The apparently anomalous location of some fossils ~ Incorrect, refer to the line "fossils appeared in wildly inappropriate places"

C. The curious magnetic orientation of magnetite rock formations ~ Incorrect , refer to the line "magnetic rocks called magnetite suggested that the earth’s magnetic pole had moved around in the past in ways that geologists knew to be impossible"

D. The clustering of volcanic and seismic activity in certain geographic Locations ~ Incorrect, refer to the line "volcanic and seismic activity appeared to be centered along certain geographic locations for no apparent reason;"

E. The phenomenon of regular tides in seas and oceans ~ Correct, this phenomenon not mentioned in the passage, so we can't say that this has been answered by the theory.
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1. The passage suggests that which two geological concepts were crucial to the development of Harry Hess’s formulation of the plate tectonics theory?

A. Seafloor spreading and subduction- As we can see directly from the passage, these two were not used
B. Subduction and continental drift- As we can see directly from the passage, these two were not used
C. Seafloor spreading and continental drift--"combined the evidence for continental drift with his own work on seafloor spreading " explains this
D. Magnetic resonance and continental drift- As we can see directly from the passage, these two were not used
E. Mantle theory and seafloor spreading- As we can see directly from the passage, these two were not used

Ans C

2. Which of the following would make the most appropriate title for this passage?

A. At the Heart of the Matter: The Quest to Determine the Composition of the Earth’s Core- We are not trying to determine the earth's core but about the positions of continents etc on Earth

B. World’s Turning: The Perplexing Story of the Earth’s Magnetic Field- Magnetic field has not been discussed, leave alone perplexing

C. Tectonic Shift: The Plate Tectonics Revolution in the Earth Sciences- Yes the passage sets some context about old beliefs in the first para and then provides evidence against it in the second and provides plate tectonic theory in third/ fourth

D. Harry Hess: A Man, a Planet, a Theory- The whole passage is not just concerned with Harry Hess

E. The Transformation of Heuristic Models in Geology, Oceanography, and Paleontology-We dont know how this transformation took place across each of these segments specifically

Ans C

3. The author’s attitude toward the plate tectonics theory can best be characterized as

A. strong disagreement-- Opposite
B. lingering doubt- he does not have a lingering doubt
C. ambivalent- he is not confused about the theory
D. supportive, but reserved- we cannot say it is reserved as it was being accepted more even in 1960s and 1960s
E. strong agreement- "however, was too powerful to be denied" indicates this along with evidence to support other people's acceptance for this

Ans E

4. Geologists believe that the Andes mountain chain along the Pacific coast of South America was created by the collision of the oceanic Nazca plate with the continental South American plate; this type of plate boundary is known as a.

A. Convergent boundary- "sometimes they press into each other at convergent boundaries, in which case one plate is subducted under the other, generally creating mountains in the process"- mountains are created with convergent boundary

B. Transform boundary- Not mentioned in passage

C. Subduction boundary- Not mentioned in passage

D. Divergent boundary- This causes seafloor spreadng

E. Tectonic boundary- Not mentioned in passage

Ans A

5. The passage suggests that the plate tectonics theory can help explain all of the following phenomena, EXCEPT.

A. The shape and location of some continents-- This can be explained as stated "continents were moving around" and a theory was made to explain this

B. The apparently anomalous location of some fossils- Due to continental drift this could be explained and earlier the passage mentioned "however, all sorts of evidence that there were problems with this view" regarding old thories before new theories were made

C. The curious magnetic orientation of magnetite rock formations- Due to continental drift this could be explained and earlier the passage mentioned "however, all sorts of evidence that there were problems with this view" regarding old thories before new theories were made

D. The clustering of volcanic and seismic activity in certain geographic Locations- Due to continental drift this could be explained and earlier the passage mentioned "however, all sorts of evidence that there were problems with this view" regarding old thories before new theories were made

E. The phenomenon of regular tides in seas and oceans- This cannot be explained by tectonic shift which is repated to movements of plates on earth

Ans E
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1. The passage suggests that which two geological concepts were crucial to the development of Harry Hess’s formulation of the plate tectonics theory?

A. Seafloor spreading and subduction
divergent boundaries (cause for seafloor spreading) , and covergent boundaries (subduction) ---refer Paragraph 3..CORRECT answer

B. Subduction and continental drift
continental drift was Alfred Wegener's concept; hence, incorrect

C. Seafloor spreading and continental drift
continental drift was Alfred Wegener's concept; hence, incorrect

D. Magnetic resonance and continental drift
continental drift was Alfred Wegener's concept; hence, incorrect

E. Mantle theory and seafloor spreading
Out of scope, since Mantle theory has not been mentioned in the passage

2. Which of the following would make the most appropriate title for this passage?

A. At the Heart of the Matter: The Quest to Determine the Composition of the Earth’s Core
The whole passage deals with the phenomenon of continental drift, supported by Plate Tectonics theory,,Composition of earth's core not deliberated upon in good measure in the passage

B. World’s Turning: The Perplexing Story of the Earth’s Magnetic Field
Only a portion of the passage deals with this aspect

C. Tectonic Shift: The Plate Tectonics Revolution in the Earth Sciences
CORRECT answer, since the whole passage deals with the phenomenon of continental drift, supported by Plate Tectonics theory

D. Harry Hess: A Man, a Planet, a Theory
Harry Hess's theory was just one view supporting the overall Plate Tectonics theory

E. The Transformation of Heuristic Models in Geology, Oceanography, and Paleontology
Out of scope stimulus


3. The author’s attitude toward the plate tectonics theory can best be characterized as

A. strong disagreement
author has supported Continental theory and Plate Tectonics concepts.

B. lingering doubt
Incorrect, since author has supported Continental theory and Plate Tectonics concepts.

C. ambivalent
Except for Paragraph 1, the author has supported Continental theory and Plate Tectonics concepts.

D. supportive, but reserved
Through presenting relevant evidence in the form of several scientists, the author has supported Continental theory and Plate Tectonics concepts..However, doesn't side fully since he has not cited his personal opinion anywhere in the passage..CORRECT answer

E. strong agreement
The author has 'reserved' support by citing evidence in the form of several scientists' theories


4. Geologists believe that the Andes mountain chain along the Pacific coast of South America was created by the collision of the oceanic Nazca plate with the continental South American plate; this type of plate boundary is known as a.

A. Convergent boundary
creation of mountain chain ---- last three lines of paragraph 3 support this option..CORRECT answer

B. Transform boundary
plates' grinding is the example, NOT the mountain chain

C. Subduction boundary
Subduction is phenomenon , not listed as boundary type

D. Divergent boundary
seafloor spreading is the example, NOT the mountain chain

E. Tectonic boundary
No such boundary type listed


5. The passage suggests that the plate tectonics theory can help explain all of the following phenomena, EXCEPT.

A. The shape and location of some continents
listed in paragraph 2 (line 10)

B. The apparently anomalous location of some fossils
listed in paragraph 2 (line 3)

C. The curious magnetic orientation of magnetite rock formations
listed in paragraph 2 (line 5)

D. The clustering of volcanic and seismic activity in certain geographic Locations
listed in paragraph 2 (lines 7 and 8)

E. The phenomenon of regular tides in seas and oceans
NOT listed as a phenomenon explaining the Plate Tectonics theory..CORRECT answer

Thus, the Correct sequence of answers is ACDAE for Q. 1,2,3,4,5
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Hello Everyone!

OAs are revealed

CCEAE

Competition mode is off now

Good explanation by Catman Elite097 and sivakumarm786

Explanation will be posted shortly.

Good luck with Day 6 questions.
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Explanation

1. The passage suggests that which two geological concepts were crucial to the development of Harry Hess’s formulation of the plate tectonics theory?

Explanation

The correct answer is C) Seafloor spreading and continental drift. The passage clearly states that Harry Hess combined his work on seafloor spreading with the evidence for continental drift to formulate his theory of plate tectonics.

Option A) includes subduction, which is mentioned in the explanation of convergent boundaries, but it is not explicitly stated as crucial to the development of Hess's theory.

Option B) includes subduction and continental drift, but the question specifically asks for the two concepts crucial to the development of Hess's theory.

Option D) includes magnetic resonance, which is mentioned in the passage as evidence for problems with the traditional view of a static earth, but it is not explicitly stated as crucial to the development of Hess's theory.

Option E) includes mantle theory, which is not mentioned at all in the passage.

Answer: C
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Explanation

2. Which of the following would make the most appropriate title for this passage?

Explanation

The most appropriate title for this passage would be "Tectonic Shift: The Plate Tectonics Revolution in the Earth Sciences." The passage is primarily about the development and acceptance of the theory of plate tectonics, which revolutionized the field of earth sciences. While the passage does mention other topics, such as the earth's magnetic field and the composition of the earth's core, these are not the main focus of the passage.

Option A and B are too specific to a certain aspect, Option D is focused on Harry Hess alone, and Option E is too broad and technical.

Answer: C
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Explanation

3. The author’s attitude toward the plate tectonics theory can best be characterized as

Explanation

The correct answer is E. strong agreement. The author presents a historical account of the development of the theory of plate tectonics, from its initial proposal by Alfred Wegener in 1915 to its eventual acceptance by the majority of earth science professionals in the 1960s and 1970s. The author notes that plate tectonics was initially resisted by traditional geologists but eventually became the fundamental explanation for the state of the continents today. The author's tone throughout the passage is objective and informative, without expressing any doubt or disagreement with the theory of plate tectonics.

Answer: E
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Explanation

4. Geologists believe that the Andes mountain chain along the Pacific coast of South America was created by the collision of the oceanic Nazca plate with the continental South American plate; this type of plate boundary is known as a.

Explanation

Option A, convergent boundary, is correct because the passage states that the Andes mountain chain was created by the collision of the oceanic Nazca plate with the continental South American plate. This type of collision between two plates is characteristic of a convergent boundary.

Option B, transform boundary, is incorrect because a transform boundary is where two plates slide past each other, such as the San Andreas fault in California.

Option C, subduction boundary, is also incorrect because subduction occurs when one plate is forced under another plate, which is not the case with the Andes mountain chain.

Option D, divergent boundary, is also incorrect because a divergent boundary is where two plates move away from each other, such as the Mid-Atlantic Ridge.

Option E, tectonic boundary, is a general term that could refer to any type of boundary between tectonic plates and is not specific enough to be the correct answer.

Answer: A
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Explanation

5. The passage suggests that the plate tectonics theory can help explain all of the following phenomena, EXCEPT.

Explanation

The correct answer is E. The passage discusses how plate tectonics can help explain the movement of continents, the anomalous location of fossils, the curious magnetic orientation of magnetite rock formations, and the clustering of volcanic and seismic activity in certain geographic locations. However, the passage does not mention anything about regular tides in seas and oceans being explained by plate tectonics. Therefore, option E is incorrect.

Answer: E
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