Last visit was: 22 Apr 2026, 09:04 It is currently 22 Apr 2026, 09:04
Close
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
Your Progress

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
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Close
Request Expert Reply
Confirm Cancel
User avatar
imgarima
Joined: 25 Feb 2010
Last visit: 09 Sep 2010
Posts: 5
Posts: 5
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
nsp007
Joined: 19 Nov 2009
Last visit: 15 Dec 2010
Posts: 161
Own Kudos:
Given Kudos: 44
Posts: 161
Kudos: 323
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
imgarima
Joined: 25 Feb 2010
Last visit: 09 Sep 2010
Posts: 5
Posts: 5
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
nsp007
Joined: 19 Nov 2009
Last visit: 15 Dec 2010
Posts: 161
Own Kudos:
Given Kudos: 44
Posts: 161
Kudos: 323
Kudos
Add Kudos
Bookmarks
Bookmark this Post
1. The traditional view supposes that the upper mantle of the earth behaves as a liquid when it is subjected to small forces for long periods and that [u]differences in temperature under oceans and continents are sufficient to produce convection in the mantle of the earth [/u]with rising convection currents under the mid-ocean ridges and sinking currents under the continents.

2. These seas have a typical oceanic floor, except that the floor is overlaid by several kilometers of sediment. Their floors have probably been sinking for long periods. It seems possible that a sinking current of cooled mantle material on the upper side of the plate might be the cause of such deep basins.... there are a number of older ones of possibly similar origin, such as the Gulf of Mexico, the Black Sea, and perhaps the North Sea.

3. ... differences in temperature under oceans and continents are sufficient to produce convection in the mantle of the earth with rising convection currents under the mid-ocean ridges and sinking currents under the continents. Theoretically, this convection would carry the continental plates along as though they were on a conveyor belt and would provide the forces needed to produce the split that occurs along the ridge.

5. Also it is difficult to see how the theory applies to the plate between the Mid-Atlantic Ridge and the ridge in the Indian Ocean. This plate is growing on both sides, and since there is no intermediate trench, the two ridges must be moving apart.

6. On the other hand, the theory is implausible because convection does not normally occur along lines, and it certainly does not occur along lines broken by frequent offsets or changes in direction, as the ridge is.

7. These seas have a typical oceanic floor, except that the floor is overlaid by several kilometers of sediment. Their floors have probably been sinking for long periods. It seems possible that a sinking current of cooled mantle material on the upper side of the plate might be the cause of such deep basins

8. Three theories about ocean basin formation have been presented. Hence the best title is "Several Theories of Ocean Basin Formation".


Hope this helps !
User avatar
imgarima
Joined: 25 Feb 2010
Last visit: 09 Sep 2010
Posts: 5
Posts: 5
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hey,

Thanks :) , but can u share with me the strategy you used to attack the passage :?: Also im confused in Question number 4 :roll: can you help me with its explaination?

Cheers!!
User avatar
nsp007
Joined: 19 Nov 2009
Last visit: 15 Dec 2010
Posts: 161
Own Kudos:
Given Kudos: 44
Posts: 161
Kudos: 323
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Always jot down the imp. keywords in each paragraph as you read through the passage. This will help you to know the flow of the passage and hence, the structure.
Create an outline for each paragraph and this will give you a hint about the main idea, purpose and attitude of the passage.

Need some expert comments here!! :)
User avatar
mailnavin1
Joined: 24 Jul 2009
Last visit: 04 Aug 2012
Posts: 119
Own Kudos:
Given Kudos: 30
Status:swimming against the current
Location: Chennai, India
Concentration: Finance
Posts: 119
Kudos: 357
Kudos
Add Kudos
Bookmarks
Bookmark this Post
read gin's techniques.. i feel this technique better than others(even my own :-D :-D :-D :-D ).

practice a few using this, if it works then that's for u :-D :-D :-D
User avatar
zajo
Joined: 12 Oct 2009
Last visit: 13 Nov 2012
Posts: 7
Concentration: Operations, Finance
GPA: 3.09
Posts: 7
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Passage 1:

1. A
2. B
3. C
4. E not sure
5. A
6. A
7. A
8. C
9. D

OA please..



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Reading Comprehension (RC) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
Moderators:
GMAT Club Verbal Expert
7391 posts
499 posts
358 posts