Given a scientific passage and an answer, generate a question for the given answer.

Example Input: Passage: Some nonmetals are very reactive, whereas others are not reactive at all. It depends on the number of electrons in their outer energy level. Answer: reactivity
Example Output: The number of electrons in the outer energy level determines what property of nonmetals?

Example Input: Passage: Scientists may publish articles about their research in peer-reviewed science journals. Peer review means that the work is analyzed by peers, in other words, by other scientists. The articles are published only if the other scientists are convinced that the research is accurate and honest. Answer: peer review
Example Output: What is the process where scientific articles are checked and analyzed by other scientists before publication?

Example Input: Passage: The length traveled by an object moving in any direction or even changing direction is called distance. Answer: distance
Example Output:
The length that an object has travelled in one or multiple directions can also be called what?