What is the difference between an adjective clause and an adverb clause?

Adjective clauses function as adjectives in a sentence to give more information about a noun (e.g., “She wants the kitten that has white paws”). Adjective clauses typically begin with a relative pronoun (e.g., “who,” “that,” “which”).

Adverbial clauses function as adverbs in a sentence to modify a verb, adjective, adverb, or entire clause (e.g., “Let’s go to the movies after we study”). Adverb clauses begin with a subordinating conjunction (e.g., “because,” “until,” “when,” “if”) and frequently answer questions such as “when?” “where?” “why?” or “how?”