Is the sentence some of the mountain highlands on the moon rise 8000 meters above the surface an adverb phrase?

No, the phrase "8000 meters above the surface" in the sentence is not an adverb phrase; it functions as a prepositional phrase. It provides specific information about the height of the mountain highlands, describing their elevation relative to the moon's surface. Adverb phrases typically modify verbs, adjectives, or other adverbs, whereas this phrase gives details about a noun.