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Because of the proximity and likeness of Mars to Earth, scientists hav

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Because of the proximity and likeness of Mars to Earth, scientists hav  [#permalink]

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New Project RC Butler 2019 - Practice 2 RC Passages Everyday
Passage # 96, Date : 20-MAR-2019
This post is a part of New Project RC Butler 2019. Click here for Details


Because of the proximity and likeness of Mars to Earth, scientists have long speculated about the possibility of life on Mars. As early as the mid 17th century, astronomers observed polar ice caps on Mars, and by the mid-19th century, scientists discovered other similarities to Earth, including the length of day and axial tilt. But in 1965, photos taken by the Mariner 4 probe revealed a Mars without rivers, oceans or signs of life. And in the 1990s, it was discovered that Mars, unlike Earth, no longer possessed a substantial global magnetic field, allowing celestial radiation to reach the planet's surface and solar wind to eliminate much of Mars's atmosphere over the course of several billion years.

More recent probes have focused on whether there was once water on Mars. Some scientists believe that this question is definitively answered by the presence of certain geological landforms. Others posit that different explanations, such as wind erosion or carbon dioxide oceans, may be responsible for these formations. Mars rovers Opportunity and Spirit, which have been exploring the surface of Mars since 2004, have both discovered geological evidence of past water activity. These findings substantially bolster claims that there was once life on Mars.
1. The passage is primarily concerned with which of the following?

(A) disproving a widely accepted theory
(B) initiating a debate about the possibility of life on Mars
(C) presenting evidence in support of a controversial claim
(D) describing the various discoveries made concerning the possibility of life on Mars
(E) detailing the findings of the Mars rovers Opportunity and Spirit



2. Each of the following discoveries is mentioned in the passage EXCEPT

(A) Wind erosion and carbon dioxide oceans are responsible for certain geological landforms on Mars.
(B) Mars does not have a substantial global magnetic field.
(C) Mars does not currently have water activity.
(D) The length of day on Mars is similar to that on Earth.
(E) The axial tilt of Mars is similar to that of Earth.



3. The passage suggests which of the following about polar ice caps?

(A) Until recently, the ones on Mars were thought to consist largely of carbon dioxide.
(B) The ones on Mars are made almost entirely of frozen water.(C) They are also found on Earth.
(D) Their formation is tied to length of day and axial tilt.
(E) They indicate that conditions on the planet Mars were once very different than they are at present.



4. It can be inferred from the passage that scientists would be more likely to suspect that Mars once held life if there were evidence of which of the following features?

(A) Carbon dioxide oceans
(B) Celestial radiation and solar wind
(C) High daily level of sunlight reaching the planet's surface
(D) Volcanic eruptions
(E) A significant global magnetic field




Difficulty Level: 650

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Originally posted by BrainLab on 08 Mar 2015, 02:56.
Last edited by SajjadAhmad on 23 Mar 2019, 00:52, edited 4 times in total.
Updated and removed flawed question
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Re: Because of the proximity and likeness of Mars to Earth, scientists hav  [#permalink]

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New post 24 Mar 2019, 06:05
Official Explanation


1. The passage is primarily concerned with which of the following?

Difficulty Level: 600

Explanation

(A) There is no widely accepted theory, just speculation. Plus, that speculation is more positive than negative! (Out of scope)

(B) The passage does discuss a potential theory (that there may once have been life on Mars), but the passage itself does not initiate any debate. Rather, it reports on various findings and opinions of others. (Out of scope)

(C) The earliest mentioned interest in Mars was in the mid-seventeenth century; this is not recent. (One word off)

(D) CORRECT.The passage does describe various discoveries made in the mid-seventeenth and mid-nineteenth centuries, as well as more recently, concerning the possibility of life on Mars.

(E) The passage does discuss this, but the rovers are passage detail; they are not the overall point of the passage. (True but not right)


2. Each of the following discoveries is mentioned in the passage EXCEPT

Difficulty Level: 700

Explanation

The question indicates that four of the answers are mentioned in the passage, so this is a detail EXCEPT question. The entire passage is about discoveries, so go straight to the first answer choice and try to find it in the passage.

(A) CORRECT. The passage says only that wind erosion or carbon dioxide may be responsible for certain geological landforms, not that they are. This is an unusual form of an Extreme answer: though the word are is not an extreme word itself, it is more extreme than may. (Extreme)

(B) True. The first paragraph says that Mars no longer possessed a global magnetic field.

(C) True. The second paragraph says that Mars rovers Opportunity and Spirit…discovered geological evidence of past water activity.

(D) True. The first paragraph states that scientists discovered similarities to Earth, including the length of day.

(E) True. The first paragraph states that scientists discovered similarities to Earth, including the… axial tilt.


3. The passage suggests which of the following about polar ice caps?

Difficulty Level: 500

Explanation

The word suggests points to an inference question. The passage mentions polar ice caps in the first paragraph:

As early as the mid-seventeenth century, astronomers observed polar ice caps on Mars, and by the mid-nineteenth century, scientists discovered other similarities to Earth, including the length of day and axial tilt.

The second half of the sentence states that scientists discovered other similarities to Earth, implying that polar ice caps are also a similarity between the two planets.

(A) The passage does mention carbon dioxide, but not in the context of polar ice caps. (Mix-up)

(B) The passage does not provide any information about the content of polar ice caps. (Out of scope)

(C) CORRECT. The sentence says that scientists discovered other similarities to Earth, implying that the earlier discovery (polar ice caps) is also similar to what is found on Earth.

(D) The passage mentions length of day and axial tilt as examples of other similarities to Earth, but it does not indicate that those had anything to do with the formation of polar ice caps. (Out of scope)

(E) It's possible that someone might believe this, but the passage does not provide any information to indicate that conditions were once very different. (Out of scope)


4. It can be inferred from the passage that scientists would be more likely to suspect that Mars once held life if there were evidence of which of the following features?

Difficulty Level: 600

Explanation

This is an inference question. Both paragraphs discuss characteristics that are possible indicators of life. Because there are so many, go straight to the answers and try to find them in the passage. But first, remind yourself that the passage also discusses characteristics that are incompatible with life. Read carefully!

(A)The second paragraph mentions that carbon dioxide oceans, rather than water, might be responsible for certain land forms, and the passage makes clear that water is an important indicator of possible life. Carbon dioxide oceans, then, would weaken the evidence for water presence, and so would not increase the chances of life. (Direct contradiction)

(B) The first paragraph mentions celestial radiation and solar wind in the context of a scenario in which there is not life. (Direct contradiction)

(C) You might posit that abundant sunlight would improve the odds of life, but the passage does not provide any information about this. (Out of scope)

(D) The passage does not provide any information about volcanic eruptions. (Out of scope)

(E) CORRECT. The first paragraph indicates that Mars, unlike Earth, does not have a substantial global magnetic field and presents this information as a negative in the debate about life on Mars. The implication, then, is that a global magnetic field would be positive evidence in favor of life on Mars.


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Re: Because of the proximity and likeness of Mars to Earth, scientists hav  [#permalink]

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New post 08 Mar 2015, 23:57
7 mins-- All correct
Please ignore Question 1 as TONE questions are almost killed by the test pattern. In mgmat site also Stacey has suggested to ignore that question.
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New post 09 Mar 2015, 01:26
in question 5 how can B be inferred … pls explain
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Re: Because of the proximity and likeness of Mars to Earth, scientists hav  [#permalink]

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New post 09 Mar 2015, 02:22
Udai wrote:
in question 5 how can B be inferred … pls explain



Hi

Few basically means lack of something

The first para says " scientists have long speculated about the possibility of life on Mars. As early as the mid-17th century "

This means that scientists have been working before the 17th century and got some healthy results in 17th and dr was some lack of evidence before that.
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New post 18 Sep 2018, 17:20
9 mins ques 5 wrong rest correct

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New post 20 Mar 2019, 09:16
+1 Kudos to posts containing answer explanation of all questions
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New post 20 Mar 2019, 15:15
is this an Official Question?
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New post 20 Mar 2019, 15:41
Hello,
On question 5 I chose D, why letter E is the correct?
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New post 20 Mar 2019, 18:15
1
Hi GMATNinja & VeritasKarishma
I was wondering could one of you experts please explain why option C is incorrect for Q3? In the passage, we are given that "More recent probes have focused on whether there was once water on Mars. Some scientists believe that this question is definitively answered by the presence of certain geological landforms." We know that the question is certainly answered but we don't know if its a yes or a no that the water does exist on Mars. Based on this I opted for option C. Option A I can see why it can be a right answer because in the passage, we are given that "...Wind erosion OR carbon dioxide oceans, may be responsible for these formations" whereas option A says "Wind erosion AND carbon dioxide oceans are responsible for certain geological landforms on Mars". I am not fully satisfied with option A being the correct answer as it merely hinges on one technical word; however, I can see why it can be the right answer.
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New post 20 Mar 2019, 23:01
Hello jaisrajat

This passage belongs to Manhattan GMAT Prep. See the tags attached with the question.

jaisrajat wrote:
is this an Official Question?

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New post 23 Mar 2019, 01:03
1
Hello Udai
manjot123 Impressed by your performance! :cool:
jaisrajat
RaquelR1409
JS1290

Guys! there were few errors with questions so i have removed the question #1 and replaced question # 3 and 4. Please take this passage again and report your revised performance. I will post the OE in 24 hours.

Thanks
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Re: Because of the proximity and likeness of Mars to Earth, scientists hav   [#permalink] 23 Mar 2019, 01:03
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