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Attempted in 8:25 min
Got 1 wrong.
AACD

Question 2 & 3 can be answered from Para1 itself. Question 3 from Last Para. However I could not get the correct essence of the Main point though i scribbled in my note the word inconclusive (from last sentence of 2nd para).

Can you post how did you identified main idea of passage?
i always get main point question wrong
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In ques 1

Why ans D is correct.
It is written in the first paragraph that there is a circuit completion which causes cloud to ground lighting.
So scientists agree on causes of cloud to ground lighting i.e circuit completion making option d partially wrong.

Thanks in advance

Sent from my Lenovo K33a42 using GMAT Club Forum mobile app
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Topic and Scope

- The author describes two theories of cloud electrification and their possible impact on controlling lightning formation.

Mapping the Passage


¶1 describes the mechanism of lightning formation and notes that scientists hope to someday control it.
¶2 introduces two competing theories of cloud electrification, convection and precipitation, and describes the older theory of precipitation.
¶3 describes the convection model of cloud electrification.
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Answers and Explanations OE



1)

What is the author‘s main purpose? To describe the competing theories on cloud charge and to describe how they might help to control lightning. (D) fits well
(A): Out of Scope. The author doesn‘t discuss recent breakthroughs, and only one of the theories presented has evidence described.
(B): Faulty Use of Detail. Though this is mentioned in the passage, it‘s not the main idea of the passage.
(C): Distortion. The author presents two competing theories, but doesn‘t endorse one or the other or argue that they‘re inaccurate.
(D): The correct answer
(E): Out of scope. The author never states his preference for any theory.

2)

Go back to the referenced line numbers to read about breakdown potential. The passage says that lightning occurs after the ―breakdown potential‖ is reached. Only A catches this cause-and-effect relationship.
(A): The correct answer
(B): Opposite. The breakdown potential is required for lightning to occur, but it‘s not a characteristic of the lightning itself.
(C): Out of Scope. The author doesn‘t mention the distance between the earth and cloud.
(D):Opposite. As with (B), this is a quality of the lightning rather than a precondition for it.
(E): Takes the meaning of ‗breakdown‘ too literally

3)

Though scientists differ on the causes of cloud electrification, you can deduce from this fact alone that they believe that cloud electrification exists. By definition, then, even the scientists who differ on the causes must both agree with (C), that there‘s a charge difference between cloud and ground.
(A): Faulty Use of Detail. While scientists who argue for the convection model in ¶3 believe this, not all scientists do.
(B): Faulty Use of Detail. This is a part of the precipitation argument in ¶2.
(C): The correct answer
(D): Opposite. This is a potential way to stop lightning from forming and also a test of the precipitation hypothesis as described in ¶2.
(E): The passage doesn‘t really connect moisture content with lightning.
Strategy Point: When a Natural Science passage presents competing theories, be on the lookout for areas of agreement as well as points of difference.

4)

Review ¶3 to review the convection theory. The main tenet of the convection model is that water droplets capture ionized gas molecules which are transported in updrafts and downdrafts. With an eye to the paragraph, look for a choice that conflicts with or is not part of the theory. (D) is part of the precipitation theory described in ¶2 and doesn‘t factor into the convection theory.
(A): Opposite. This is mentioned in line 39.
(B): Opposite. This is mentioned in ¶1 and is the basis for both theories.
(C): Opposite. As described in ¶3, this must be true in order for the ionized gas particles to be transported.
(D): The correct answer
(E): Opposite. This is mentioned in ¶3
Strategy Point: Proper names, italicized text, and titles can all be a useful way to quickly zero in on relevant concepts and text.
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raveesh1203
In ques 1

Why ans D is correct.
It is written in the first paragraph that there is a circuit completion which causes cloud to ground lighting.
So scientists agree on causes of cloud to ground lighting i.e circuit completion making option d partially wrong.

Thanks in advance

Sent from my Lenovo K33a42 using GMAT Club Forum mobile app


I think answer D is correct because paragraph 1 & 2 discusses the reasons why lightning occurs and the process which the charge is built. Paragraph 1 is saying the precipitation model (drops of water becomes negatively charged) while paragraph 2 discusses, experiments and hypothesizes a different cause (the ion model, charge is due to updrafts/downdrafts, explained in the experiment). Although i didnt get this question correct ( i choose b because i was lured by the hypotheses power of paragraph 1&2), answer D is better in hindsight.
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Hello, I am newbie here it took me 15mins to comprehend the passage and answer the questions. I have just started my preparation can anyone help me that which rc,s should i practice in starting .
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Got all correct, but took 10 mins though. What could be the difficulty level of this RC passage?
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akshayshukla1991
Got all correct, but took 10 mins though. What could be the difficulty level of this RC passage?

Welcome to GMAT Club!

In my opinion, the following should be the difficulty level of each question.

Question #1: 650
Question #2: 550
Question #3: 600-650
Question #4: 600-650

Overall: 600
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akshayshukla1991
Got all correct, but took 10 mins though. What could be the difficulty level of this RC passage?

Passage was tough and dense. But questions were pretty easy. If you understand the passage, answering the questions was a breeze. So around 680.
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took me 10 min and got three correct.
i think long way to go
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