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: a thermal insulator slows the transfer of heat

SOLUTION: A thermal insulator slows the transfer of what?

PROBLEM: Fact: processes sometimes produce waste products

SOLUTION: What product eventually will become human waste?

PROBLEM: Fact: plants are a source of oxygen through photosynthesis

SOLUTION:
Chloroplasts in shrubs scrub carbon from the air and return?