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# Students in the early 1960s were taught that electrons orbit

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Director
Joined: 16 Aug 2005
Posts: 938
Location: France
Students in the early 1960s were taught that electrons orbit [#permalink]

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26 Jun 2006, 19:37
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Students in the early 1960s were taught that electrons orbit the nucleus of an atom and the path of this orbit was circular.

A. the path of this orbit was
B. the path of this orbit is
C. the path of this orbit has been
D. that the path of this orbit is
E. that the path of the orbit was

QA later
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VP
Joined: 07 Nov 2005
Posts: 1118
Location: India

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26 Jun 2006, 19:46
Picking D.
Although not seen much, but two restrictive clauses make absolute sense here.
SVP
Joined: 30 Mar 2006
Posts: 1728

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26 Jun 2006, 21:42
Will go wtih D.

As stated by buzz..... two restrive clauses are required.

Also the correct tense should be "is"
Director
Joined: 16 Aug 2005
Posts: 938
Location: France

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27 Jun 2006, 04:40
Can you please explain why we need 'is' and not 'was'?
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VP
Joined: 25 Nov 2004
Posts: 1483

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27 Jun 2006, 05:58
gmatmba wrote:
Can you please explain why we need 'is' and not 'was'?

first it (is) has to be parallel with the other verb "orbit". even it was in 1960, these activities were taught as universal truth/fact. therefore, the verbs "orbit" and "is" are used in present tense.
Senior Manager
Joined: 11 May 2006
Posts: 258

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27 Jun 2006, 23:58
i am confused here.

||ism and tense says D is better

Now orbit is first used as a verb but A, B, C, D all say "this orbit" (as a noun) - so this refers to what ??

Its like saying, I bike to work and the color of this bike is red -- which bike???

the orbit makes more sense which is used in E.

Manager
Joined: 15 Jun 2006
Posts: 69
Location: Seoul

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28 Jun 2006, 02:01
gmatmba wrote:
Students in the early 1960s were taught that electrons orbit the nucleus of an atom and the path of this orbit was circular.

A. the path of this orbit was
B. the path of this orbit is
C. the path of this orbit has been
D. that the path of this orbit is
E. that the path of the orbit was

QA later

Go with B

I think two facts (orbitting and circular path) are not separate ones.
So they should be contained in one 'that'.
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Director
Joined: 16 Aug 2005
Posts: 938
Location: France

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28 Jun 2006, 06:34
OA is D
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Manager
Joined: 22 May 2006
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28 Jun 2006, 07:31
iced_tea wrote:
i am confused here.

||ism and tense says D is better

Now orbit is first used as a verb but A, B, C, D all say "this orbit" (as a noun) - so this refers to what ??

Its like saying, I bike to work and the color of this bike is red -- which bike???

the orbit makes more sense which is used in E.

In the first part of the sentence, "orbit" is used as a verb that is in the present tense. In the second part of the sentence, "the orbit" is used as a noun. D's second parallel verb is "was", which is past tense and not parallel to the first part.

It needs to be "is" to parallel "orbit".
VP
Joined: 14 May 2006
Posts: 1403

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28 Jun 2006, 10:38
Students in the early 1960s were taught that electrons orbit the nucleus of an atom and THAT the path of this orbit IS circular.

"that" is needed for ||sm
1st part: "electrons" is a subject "orbit" is the verb (present simple)
2nd part: "path" is subject "is" (present simple)

that's why D is correct

PS I think when I saw this ? first in a rush, I thought orbit was a noun... but after reading the whole thing, it made sense that it is used as a verb...
Intern
Joined: 22 Jun 2006
Posts: 49
Location: Big Apple

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28 Jun 2006, 14:14
Ditto with buzz, janayak, and MA....parallelism, universal truth and restrictive clauses support D.
Re: SC electrons   [#permalink] 28 Jun 2006, 14:14
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