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

[EX Q]: The height of the wave is used to determine the magnitude of an earthquake.
[EX A]: What measurement of the wave is used to determine the magnitude of an earthquake?

[EX Q]: Electric motors transform electrical energy into kinetic energy.
[EX A]: Electric motors transform electrical energy into what other form of energy?

[EX Q]: Combustion reaction occurs when a substance reacts quickly with oxygen.
[EX A]:
What occurs when a substance reacts quickly with oxygen?