Our science teacher, Mrs. Jefferies, told us "that Mercury is the planet closet to the sun."
Identify the clasue as a noun clause (N) or an adjectival clause (A)
To identify whether the given clause is a noun clause (N) or an adjectival clause (A), we need to determine its function in the sentence.
In this case, the clause "that Mercury is the planet closet to the sun" functions as a noun clause because it acts as the direct object of the verb "told." Noun clauses can function as subjects, direct objects, indirect objects, or objects of prepositions. In this sentence, it serves as the direct object of the verb "told."
Therefore, the clause is categorized as a noun clause (N).
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