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 incandescent light bulb converts electricity into light by sending electricity through a filament

SOLUTION: Tungsten is a metal which is found in large amounts in filaments, which are used in incandescent light bulbs. These light bulbs work because?

PROBLEM: Fact: many vehicles emit pollution into the air

SOLUTION: Pollution is?

PROBLEM: Fact: nearly all fossils are found in sedimentary rock

SOLUTION:
Sedimentary rock may be a result of?