instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: Matter can be classified as transparent, translucent, or opaque depending on how it interacts with light. Answer: opaque
answer:
Depending on how matter interacts with light, it can be classified as transparent, translucent, or what?

question:
Passage: An ionic bond is the force of attraction that holds together oppositely charged ions. Ionic bonds form crystals instead of molecules. Table salt contains ionic bonds. Answer: ionic bond
answer:
What term means the force of attraction that holds together oppositely charged ions?

question:
Passage: Sporophytes sprout up on stalks from this bed of moss gametophytes. Notice that both the sporophytes and gametophytes exist at the same time. Answer: sporophytes
answer:
What sprouts up on stalks from the bed of moss gametophytes?