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.

Fact: moving an object from a cool place to a warm place causes the object 's temperature to increase
Taking a chicken leg from a deep freezer and placing it on a kitchen counter will?

Fact: adaptations are used for survival
Polar bears grew thick fur because?

Fact: processes sometimes produce waste products
What product eventually will become human waste?