Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

Fact: if a new predator begins eating prey then the population of that prey will decrease
If a new predator begins eating prey, what will happen to the preys population?

Fact: as distance to a city decreases , the amount of light pollution will increase
In the wilderness, light pollution is?

Fact: metal is sometimes magnetic

A person may find that iron attracts other items such as?