When the wound exists or occurs at or on the surface it is known as?

I sat here racking my mind for a half hour trying to figure out the answer to this question. Then it dawned on me that the grammar in this sentence is so bad, that I just didn't read the question right. the ANSWER IS "superficial." The question should be Worded: "When the wound exists or occurs at or on the surface, it is know as what?"