The crater, estimated to be 50,000 years old, was the result of a meteorite, a mass of stone or metal, crashing into earth. identify the word that the underlined appositive phrase renames.

An appositive is defined as the word or words that identifies or renames a noun or pronoun. In the given question above, the underlined appositive phrase is "a mass of stone or metal", and this appositive identifies the noun "meteorite". Typically, appositive phrases are enclosed by commas because they also serve as an additional information about the subject. Hope this answer helps.