There seems to be no one here who is familiar enough with the Quran to answer you at this time.

You are certainly free to use any search engine, but be aware that you will find conflicting and confusing results, as with most online searches.
http://www.google.com/search?q=quran&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA

Sorry we couldn't be of better help.

What does “seven earths” as implied in verse 12 surah at-Talaq actually mean?
Why does the Quran use only a singular noun when describing the earth(or seven earths) in this case whereas when describing seven heavens a plural noun (as-samawat) is used?
Is the word as-samawat introduced by the revelation of the Quran i.e. it was not known to be used before(maybe the Arabs only used the word as-sama’ before the Quran was revealed)?

I will try my best to answer this when I get home. I'm not familiar with it, but may have some resources.

I have been on vacation since Wednesday and am using the computer at the hotel. I hope it's not too late, but I will try my best when I get back.

Matt

In all honesty, I don't have a solid answer for this. I did find this:

"Regardless of what the seven heavens are, it is crystal clear that “seven earths” means that there are seven planets like our own, regardless of what the verse as a whole means." on

http://72.14.235.104/search?q=cache:XmIzLG2m5oAJ:uiforum.uaeforum.org/showthread.php%3Ft%3D1348+%22seven+earths%22+%22verse+12%22&hl=en&ct=clnk&cd=28

I don't know how reliable that is.

I would try here:

(Broken Link Removed)

I don't even know enough about the language to answer why it uses singular/plural in different instances.

I hope that resource helps.

Matt