Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 30 Aug 2016, 19:20

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# The Earth s rivers constantly carry dissolved salts into its

Author Message
TAGS:

### Hide Tags

Manager
Joined: 16 Oct 2006
Posts: 162
Followers: 1

Kudos [?]: 176 [0], given: 0

The Earth s rivers constantly carry dissolved salts into its [#permalink]

### Show Tags

16 Oct 2006, 21:51
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

The Earthâ€™s rivers constantly carry dissolved salts into its oceans. Clearly, therefore, by taking the resulting increase in salt levels in the oceans over the past hundred years and then determining how many centuries of such increases it would have taken the oceans to reach current salt levels from a hypothetical initial salt-free state, the maximum age of the Earthâ€™s oceans can be accurately estimated.

Which of the following is an assumption on which the argument depends?

A. The quantities of dissolved salts deposited by rivers in the Earthâ€™s oceans have not been unusually large during the past hundred years.
B. At any given time, all the Earthâ€™s rivers have about the same salt levels.
C. There are salts that leach into the Earthâ€™s oceans directly from the ocean floor.
D. There is no method superior to that based on salt levels for estimating the maximum age of the Earthâ€™s oceans.
E. None of the salts carried into the Earthâ€™s oceans by rivers are used up by biological activity in the oceans.
Manager
Joined: 01 Jun 2006
Posts: 80
Followers: 1

Kudos [?]: 0 [0], given: 0

### Show Tags

16 Oct 2006, 21:56
Straight A. 23 seconds. If salt in the last 100 years is exceptionally high, then the methodology described to figure out the age of the ocean will be skewed.
Manager
Joined: 02 Aug 2006
Posts: 216
Location: Taipei
Followers: 2

Kudos [?]: 124 [0], given: 0

Re: CR - Earth River [#permalink]

### Show Tags

16 Oct 2006, 22:11
KC wrote:
The Earthâ€™s rivers constantly carry dissolved salts into its oceans. Clearly, therefore, by taking the resulting increase in salt levels in the oceans over the past hundred years and then determining how many centuries of such increases it would have taken the oceans to reach current salt levels from a hypothetical initial salt-free state, the maximum age of the Earthâ€™s oceans can be accurately estimated.

Which of the following is an assumption on which the argument depends?

A. The quantities of dissolved salts deposited by rivers in the Earthâ€™s oceans have not been unusually large during the past hundred years.
B. At any given time, all the Earthâ€™s rivers have about the same salt levels.
C. There are salts that leach into the Earthâ€™s oceans directly from the ocean floor.
D. There is no method superior to that based on salt levels for estimating the maximum age of the Earthâ€™s oceans.
E. None of the salts carried into the Earthâ€™s oceans by rivers are used up by biological activity in the oceans.

E

negate E...

if the salts are used up by biological/other activity , then the age of ocean cannot be determined
Director
Joined: 18 Jul 2006
Posts: 528
Followers: 1

Kudos [?]: 49 [0], given: 0

### Show Tags

16 Oct 2006, 23:59
Straight E.
Senior Manager
Joined: 19 Jul 2006
Posts: 361
Followers: 1

Kudos [?]: 4 [0], given: 0

### Show Tags

17 Oct 2006, 04:37
I find D and E very Close.
will go with D
VP
Joined: 21 Aug 2006
Posts: 1025
Followers: 1

Kudos [?]: 26 [0], given: 0

Re: CR - Earth River [#permalink]

### Show Tags

17 Oct 2006, 05:57
KC wrote:
The Earthâ€™s rivers constantly carry dissolved salts into its oceans. Clearly, therefore, by taking the resulting increase in salt levels in the oceans over the past hundred years and then determining how many centuries of such increases it would have taken the oceans to reach current salt levels from a hypothetical initial salt-free state, the maximum age of the Earthâ€™s oceans can be accurately estimated.

Which of the following is an assumption on which the argument depends?

A. The quantities of dissolved salts deposited by rivers in the Earthâ€™s oceans have not been unusually large during the past hundred years.

Seems right.

B. At any given time, all the Earthâ€™s rivers have about the same salt levels.

we are concerned about what earth's rivers carry to sea, not what the rivers have.

C. There are salts that leach into the Earthâ€™s oceans directly from the ocean floor.

That can happen even in the last 100 years. That factor is constant. We dont need to worry. C is out.

D. There is no method superior to that based on salt levels for estimating the maximum age of the Earthâ€™s oceans.

We dont need to bother about the validity of method. Author is using that method. Thats it.

E. None of the salts carried into the Earthâ€™s oceans by rivers are used up by biological activity in the oceans.

Just like in C, that factor is constant. E is out

_________________

The path is long, but self-surrender makes it short;
the way is difficult, but perfect trust makes it easy.

Senior Manager
Joined: 13 Sep 2006
Posts: 281
Location: New York
Followers: 1

Kudos [?]: 14 [0], given: 0

### Show Tags

17 Oct 2006, 06:12
I also think the answer should be E. I think in these type of questions (assumptions) we need to find a factor that is not mentioned (i.e salt being used for biological purposes).

_________________

"Never let the fear of striking out get in your wayâ€

SVP
Joined: 24 Aug 2006
Posts: 2132
Followers: 3

Kudos [?]: 128 [0], given: 0

### Show Tags

17 Oct 2006, 06:59
Am I wrong here?

I think the question should read something like, "All of the following statements are assumptions EXCEPT"

They all sound good, D to a lesser degree and C is not a strong assumption.
Manager
Joined: 16 Oct 2006
Posts: 162
Followers: 1

Kudos [?]: 176 [0], given: 0

### Show Tags

17 Oct 2006, 09:28
OA is E.

Unfortunately, I don't have OE.

Though I can't tell you the source, but it will be very useful for you guys.

=)
Senior Manager
Joined: 11 Jul 2006
Posts: 382
Location: TX
Followers: 1

Kudos [?]: 10 [0], given: 0

### Show Tags

17 Oct 2006, 14:23
Late but sure E .
Manager
Joined: 13 Sep 2006
Posts: 212
Followers: 2

Kudos [?]: 1 [0], given: 0

### Show Tags

17 Oct 2006, 17:27
E..

I thought D might be the choice at first, but then I realized it was irrelavent

The argument assumes the method is an accurate model, but that doesn't neccisarily mean there is or there is not a 'superior' method out there..
VP
Joined: 25 Jun 2006
Posts: 1172
Followers: 3

Kudos [?]: 132 [0], given: 0

### Show Tags

17 Oct 2006, 18:49
E is better than A
Similar topics Replies Last post
Similar
Topics:
105 The Earth s rivers constantly carry dissolved salts into its 68 14 Aug 2008, 23:45
5 The Earth s rivers constantly carry dissolved salts into its 28 19 Jun 2008, 11:44
1 The Earth s rivers constantly carry dissolved salts into its 22 02 Apr 2008, 18:50
2 The Earth's rivers constantly carry dissolved salts into its 20 06 Jan 2008, 17:04
The Earth s rivers constantly carry dissolved salts into its 12 20 Dec 2007, 16:47
Display posts from previous: Sort by