Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[EX Q]: You call the separation of ions that occurs when a solid ionic compound dissolves dissociation.
[EX A]: What do you call the separation of ions that occurs when a solid ionic compound dissolves?

[EX Q]: Cancer occurs most often in adults over fifty age.
[EX A]: Cancer occurs most often in adults over what age?

[EX Q]: A telescope is used to make objects in space appear closer.
[EX A]:
What instrument is used to make objects in space appear closer?