TASK DEFINITION: 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.
PROBLEM: Fact: An example of combining two substances is pouring one substance into the other substance

SOLUTION: An example of combining two substances is?

PROBLEM: Fact: if a habitat is removed then that habitat is destroyed

SOLUTION: When would a habitat be considered destroyed?

PROBLEM: Fact: iron nails are made of iron

SOLUTION:
What is something that could be made from iron?