instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Combustion reaction occurs when a substance reacts quickly with oxygen.
answer:
What occurs when a substance reacts quickly with oxygen?


question:
Resistors connected end to end are said to be in series.
answer:
Resistors connected end to end are said to be in what?


question:
A perfectly inelastic collision reduces internal kinetic energy to the minimum it can have while still conserving momentum.
answer:
A perfectly inelastic collision reduces internal kinetic energy to the minimum it can have while still conserving what?