What is difference between noun clause and adverb clause

Dear student,

 

A noun clause has a subject and verb. It functions as a noun in a sentence. 

For instance, 

In the sentence, 'The Namesake' is written by Jhumpa Lahiri, 
'The Namesake' is the name of a book and thus considered to be a noun.
However, if the sentence would have been 'The book I was reading last night is written by Jhumpa Lahiri',
then the entire underlined part would be a noun clause which would act as a noun. 

An adverb clause is a dependent clause which functions as an adverb in a sentence. It has a subject and verb.
Finally, an adverb clause always answers either of the following questions: How, When or Why?

For example, 

In the sentence, 'You should reach the station as quickly as possible if you don't want to miss your train', the italicised part of the sentence is an adverb clause.

Regards