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: refracting sunlight causes light to split into different colors

SOLUTION: A rainy day leaves a lot of moisture in the air and rainbows occur?

PROBLEM: Fact: if a new predator begins eating prey then the population of that prey will decrease

SOLUTION: If a new predator begins eating prey, what will happen to the preys population?

PROBLEM: Fact: freezing point means temperature below which a liquid freezes

SOLUTION:
If you want to walk over a lake, which of these is necessary?