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# The axis of Earth s daily rotation is tilted with respect to

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28 Mar 2011, 10:47
I'll vote for B.

(A) If Mars had a sufficiently large nearby moon, Mars would be able to support life. - Cannot be inferred. Life to be supported needs other conditions.
(B) If Earth’s Moon were to leave Earth’s orbit, Earth’s climate would be unable to support life. Correct
(C) Any planet with a stable, moderate axis tilt can support life. - extreme answer not supported
(D) Gravitational influences other than moons have little or no effect on the magnitude of the tilt angle of either Earth’s or Mars’s axis. - extreme answer not supported
(E) No planet that has more than one moon can support life. - extreme answer not supported
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13 May 2011, 00:09
Between B and C.

C is based on conclusion but has an extreme word reference 'any'

B is based on premise but is subtle.

B seems better choice.
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22 Jul 2011, 18:54
I go for B. Earth's life is supported due to proper tilt. Moon gives the proper tilt. Hence if the moon goes away the tilt would get distorted and life would not be supported anymore.
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22 Jul 2011, 20:36
C,D, and E have extreme language OR material outside the scope of the passage. (You can't derive any of the inferences from what is given in the passage).
Between A and B, A is talking about an example. If you use the +1 and -1 technique to see which has a higher chance of a correct answer. I would go with +1 for B because it directly relates to a planet in the passage. I would not give a -1 to either of the choices A or B.

This leaves me with B as the answer.

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Updated on: 15 Sep 2011, 14:20
statement2: stable angle --> gravity of moon
contra: no gravity of moon --> no stable angle

statement3: no stable angle --> extreme climate [no life]

combining: no gravity of moon --> no stable angle --> extreme climate [no life]
this is exactly what B says.
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Originally posted by MBAhereIcome on 08 Sep 2011, 04:23.
Last edited by MBAhereIcome on 15 Sep 2011, 14:20, edited 2 times in total.
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08 Sep 2011, 08:56
prinits wrote:
The axis of Earth’s daily rotation is tilted with respect to the plane of its orbit at an angle of roughly 23 degrees. That angle can be kept fairly stable only by the gravitational influence of Earth’s large, nearby Moon. Without such a stable and moderate axis tilt, a planet’s climate is too extreme and unstable to support life. Mars, for example, has only very small moons, tilts at wildly fluctuating angles, and cannot support life.

If the statements above are true, which one of the following must also be true on the basis of them?

(A) If Mars had a sufficiently large nearby moon, Mars would be able to support life.
(B) If Earth’s Moon were to leave Earth’s orbit, Earth’s climate would be unable to support life.
(C) Any planet with a stable, moderate axis tilt can support life.
(D) Gravitational influences other than moons have little or no effect on the magnitude of the tilt angle of either Earth’s or Mars’s axis.
(E) No planet that has more than one moon can support life.

Option B talks about what happens when the moon leaves earth's orbit. Earth will become like Mars. So B.
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30 Mar 2012, 06:52
tarek99 wrote:
prinits wrote:
The axis of Earth’s daily rotation is tilted with respect to the plane of its orbit at an angle of roughly 23 degrees. That angle can be kept fairly stable only by the gravitational influence of Earth’s large, nearby Moon. Without such a stable and moderate axis tilt, a planet’s climate is too extreme and unstable to support life. Mars, for example, has only very small moons, tilts at wildly fluctuating angles, and cannot support life.
If the statements above are true, which one of the following must also be true on the basis of them?
(A) If Mars had a sufficiently large nearby moon, Mars would be able to support life.
(B) If Earth’s Moon were to leave Earth’s orbit, Earth’s climate would be unable to support life.
(C) Any planet with a stable, moderate axis tilt can support life.
(D) Gravitational influences other than moons have little or no effect on the magnitude of the tilt angle of either Earth’s or Mars’s axis.
(E) No planet that has more than one moon can support life.

I pick option D.

a) The argument talks about Earth, so Mars is irrelevant
b) It is rather the gravitational influence of the moon that helps keep the angle of roughly 23 degrees. Even though it's true that Earth's climate will be unable to support life when the moon leaves, there's also no guarantee that Earth's climate will continue to support life if the moon is still around. Other factors such as global warming can eventually lead the climate to harm life even when the moon is still around.
c) we don't know whether a stable, moderate axis on other planets can support life, but we do know at least that it is keeping life that already exists on earth.
D) Correct. The argument says, "That angle can be kept fairly stable only by the gravitational influence of Earth’s large, nearby Moon."
E) We only know about earth. A sample can not represent the whole population. What works for earth may not necessarily works for other planets.

i kind of agree with Tarek as i had also picked D as answer....that is the assumption we are trying to find here....so i am confused.....
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Re: The axis of Earth s daily rotation is tilted with respect to  [#permalink]

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02 Apr 2012, 20:28
B.

Facts:
stable angle is important
23* is important
the moon helps stabilize the angle
mars has widely tilting angles
mars has small moons (assumption: cannot help stabilize)
earth (main topic) is important -- anything about any other planets is not important
"plane of its orbit" is important... shows that it is influenced by something other than "moon". moon is not the only factor.

because of this, we can eliminate a, c, e.
between B & D: look at "plane of its orbit"
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Re: The axis of Earth s daily rotation is tilted with respect to  [#permalink]

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22 Aug 2012, 09:26
why is D wrong
is it because nothing is talked about the gravitational influence of moons of mars???

but that is explicit from the last statement..
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Re: The axis of Earth s daily rotation is tilted with respect to  [#permalink]

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02 Apr 2013, 05:35
I may be wrong..Nowhere it says that stable axis supports life..It says unstable axis doesnt supports life.
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Re: The axis of Earth s daily rotation is tilted with respect to  [#permalink]

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04 Apr 2013, 12:49
Key is that the statement is about EARTH - focus on it, Mars is an afterthougt
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Re: The axis of Earth s daily rotation is tilted with respect to  [#permalink]

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18 Apr 2013, 01:36
The axis of Earth’s daily rotation is tilted with respect to the plane of its orbit at an angle of roughly 23 degrees. That angle can be kept fairly stable only by the gravitational influence of Earth’s large, nearby Moon. Without such a stable and moderate axis tilt, a planet’s climate is too extreme and unstable to support life. Mars, for example, has only very small moons, tilts at wildly fluctuating angles, and cannot support life.

If the statements above are true, which one of the following must also be true on the basis of them?

(A) If Mars had a sufficiently large nearby moon, Mars would be able to support life. not sure
(B) If Earth’s Moon were to leave Earth’s orbit, Earth’s climate would be unable to support life. if moon leaves the orbit, the axis will change resulting in extreme climate, Hence life won't be supported
(C) Any planet with a stable, moderate axis tilt can support life. not conclusive
(D) Gravitational influences other than moons have little or no effect on the magnitude of the tilt angle of either Earth’s or Mars’s axis. large moons have the effect
(E) No planet that has more than one moon can support life. extreme
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Re: The axis of Earth s daily rotation is tilted with respect to  [#permalink]

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09 Aug 2016, 19:54
Picked B. However, Einstein wouldn't agree with the argument :p
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Re: The axis of Earth s daily rotation is tilted with respect to  [#permalink]

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09 Aug 2016, 21:54
The axis of Earth’s daily rotation is tilted with respect to the plane of its orbit at an angle of roughly 23 degrees. That angle can be kept fairly stable only by the gravitational influence of Earth’s large, nearby Moon. Without such a stable and moderate axis tilt, a planet’s climate is too extreme and unstable to support life. Mars, for example, has only very small moons, tilts at wildly fluctuating angles, and cannot support life.

If the statements above are true, which one of the following must also be true on the basis of them?

(A) If Mars had a sufficiently large nearby moon, Mars would be able to support life. :- it's not about size but gravitational influence.
(B) If Earth’s Moon were to leave Earth’s orbit, Earth’s climate would be unable to support life.

(C) Any planet with a stable, moderate axis tilt can support life. :- , a planet’s climate is too extreme and unstable to support life without stable and moderate axis tilt but it doesnt mean its all what it take. It's a necessary condition not only condition.

(D) Gravitational influences other than moons have little or no effect on the magnitude of the tilt angle of either Earth’s or Mars’s axis.
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Re: The axis of Earth s daily rotation is tilted with respect to  [#permalink]

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22 Apr 2017, 02:22
1
To attack this problem effectively, you must recognize the conditional
indictors in each sentence: “only” in the second sentence and “without” in the
third sentence.
AS = angle stable,
GI = gravitational influence of Earth’s large, nearby Moon,
PCE = planet’s climate too extreme and unstable to support life.
Sentence 2: AS—>GI.
Sentence 3: notPCE—>AS.
Chain: notPCE—>AS—>GI. Again, consider the answers that are most likely to
appear in a problem like this: either the chain inference notPCE --->GI, or the
contrapositive of that chain inference, notGI--->PCE.

A) This incorrect answer is the Mistaken Reversal of the chain inference. The
diagram for this answer choice would be as follows, with the sub-M indicating
Mars: GI—>~PCE.

Answer choice (B): This is the correct answer. As expected, this is the contrapositive of the chain inference.
Answer choice (C):This incorrect answer is the Mistaken Reversal of the third sentence, and is
diagrammed as follows: AS—>~PCE.
Answer choice (D): This answer discusses issues that were not raised in the stimulus, and is thus incorrect.

Answer choice (E): The stimulus indicates that Earth’s large Moon has been
necessary for the stable angle of Earth’s tilt, and this stable angle has been
necessary for a climate that can support life. Mars, with many small moons,
tilts at fluctuating angles and cannot support life. The key difference is that
Earth’s Moon is large, and that creates a greater gravitational influence. It is
possible therefore, that a planet with more than one moon could have a
stable angle as long as at least one of the moons was of sufficient size (in
Mars’ case, the stimulus indicates each moon is small). Thus, it is possible
that a planet can have more than one moon and support life. This scenario is
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The axis of Earth s daily rotation is tilted with respect to  [#permalink]

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05 Jul 2017, 13:31
Here's is my take on this question. Please correct if I am wrong.

(A) If Mars had a sufficiently large nearby moon, Mars would be able to support life.
Seems like right answer but actually is not.
Reason: Choice A makes it sounds that to support life the stable tilt is the only critical condition that needs to be satisfied. (i.e. stable tilt with no water or no air still can not support life.)

(B) If Earth’s Moon were to leave Earth’s orbit, Earth’s climate would be unable to support life.
Exactly matches what passage mentioned.

(C) Any planet with a stable, moderate axis tilt can support life.
same error as choice A.

(D) Gravitational influences other than moons have little or no effect on the magnitude of the tilt angle of either Earth’s or Mars’s axis.
Out of scope. the passage does not mention anything besides Moon, Earth and Mars.

(E) No planet that has more than one moon can support life.
Passage does not come to such conclusion.
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Re: The axis of Earth s daily rotation is tilted with respect to  [#permalink]

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21 Jul 2017, 09:20
The axis of Earth’s daily rotation is tilted with respect to the plane of its orbit at an angle of roughly 23 degrees. That angle can be kept fairly stable only by the gravitational influence of Earth’s large, nearby Moon. Without such a stable and moderate axis tilt, a planet’s climate is too extreme and unstable to support life. Mars, for example, has only very small moons, tilts at wildly fluctuating angles, and cannot support life.

If the statements above are true, which one of the following must also be true on the basis of them?

(A) If Mars had a sufficiently large nearby moon, Mars would be able to support life. not necessary
(B) If Earth’s Moon were to leave Earth’s orbit, Earth’s climate would be unable to support life. Correct answer
(C) Any planet with a stable, moderate axis tilt can support life. very general statement and may notbe true based on the extreme climates
(D) Gravitational influences other than moons have little or no effect on the magnitude of the tilt angle of either Earth’s or Mars’s axis. Other gravitational infuences is out of scope.
(E) No planet that has more than one moon can support life.No such point in the argument.
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Re: The axis of Earth s daily rotation is tilted with respect to  [#permalink]

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25 Sep 2017, 21:19
prinits wrote:
The axis of Earth’s daily rotation is tilted with respect to the plane of its orbit at an angle of roughly 23 degrees. That angle can be kept fairly stable only by the gravitational influence of Earth’s large, nearby Moon. Without such a stable and moderate axis tilt, a planet’s climate is too extreme and unstable to support life. Mars, for example, has only very small moons, tilts at wildly fluctuating angles, and cannot support life.

If the statements above are true, which one of the following must also be true on the basis of them?

(A) If Mars had a sufficiently large nearby moon, Mars would be able to support life.
(B) If Earth’s Moon were to leave Earth’s orbit, Earth’s climate would be unable to support life.
(C) Any planet with a stable, moderate axis tilt can support life.
(D) Gravitational influences other than moons have little or no effect on the magnitude of the tilt angle of either Earth’s or Mars’s axis.
(E) No planet that has more than one moon can support life.

the options B says "If Earth’s Moon were to leave Earth’s orbit", How can we assume that the Earth's moon is the large nearby moon ?? It could be any small moon right ?? Please explain !!!
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Re: The axis of Earth s daily rotation is tilted with respect to  [#permalink]

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29 Sep 2017, 15:41
1
sumanainampudi wrote:
the options B says "If Earth???s Moon were to leave Earth???s orbit", How can we assume that the Earth's moon is the large nearby moon ?? It could be any small moon right ?? Please explain !!!

The passage references "Earth’s large, nearby Moon." Sure, technically speaking, it is possible that the Earth has several smaller moons and the passage is only referring, in this case, to the "large, nearby" moon. But notice that a capital "M" is used in "Earth's Moon", and a lowercase "M" is used to refer to the "small moons" of Mars. A proper noun is used to refer to the Earth's Moon because we are referring to a specific astronomical body with a name (the Moon).

This same specific astronomical body is referenced again in choice (B). If the Earth had several smaller moons and the author wanted choice (B) to include any of those moons, it would have been: "If any of the Earth’s moon's (lowercase "m") were to leave Earth’s orbit, Earth’s climate would be unable to support life." More importantly, the other options can be eliminated using process of elimination.

Also, even though you shouldn't let reality get in the way of your GMAT, the GMAT won't ask you to swallow facts that contradict common knowledge... so don't lose too much sleep over the Earth's "smaller moons", unless you know something about astronomy that I don't!
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