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: adding salt to a solid decreases the freezing point of that solid
[EX A]: Salt was at one time?

[EX Q]: Fact: as temperature in the environment increases , the body temperature of a reptile in that environment will increase
[EX A]: A reptile's body temperature?

[EX Q]: Fact: as the number of sources of food increase in an environment , the population of the organisms will increase in that environment
[EX A]:
When the availability of food sources increase in an environment, what will also increase?