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

[EX Q]: The frequency of a wave is the reciprocal of the period of the wave.
[EX A]: The frequency of a wave is the reciprocal of what other attribute of the wave?

[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]: All environments on earth do bacteria live.
[EX A]:
Where on earth do bacteria live?