paoladelarosa

Noun clauses act in the same way other nouns act.  They can act as the subject of a sentence, predicate nominate, direct object, indirect object, object of the preposition, and appositive or appositive phrase.  They usually have a subordinating conjunction that introduces them.

Go to the following sites to learn more about noun clauses. 

http://esl.lbcc.cc.ca.us/eesllessons/nounclauses/nounclause.htm

http://esl.lbcc.cc.ca.us/eesllessons/nounclauses/nclauseqwfib.htm

http://www.chompchomp.com/terms/clause.htm