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.

[EX Q]: Fact: flowing liquid can push objects
[EX A]: If a creek is headed to the west and a stone is tossed in and sinks, but a leaf also drops in and stays on top of the water, what will likely happen?

[EX Q]: Fact: a chloroplast contains chlorophyll
[EX A]: What contains chlorophyll?

[EX Q]: Fact: as available water decreases , the population of plants will decrease
[EX A]:
The population of plants will go down if?