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

[EX Q]: The pressure of a sample of gas is measured with an open-end manometer.
[EX A]: The pressure of a sample of gas is measured with an open-end what?

[EX Q]: The correct order of food traveling through the digestive system after it is swallowed is: esophagus, stomach, small intestine, large intestine.
[EX A]: Which list gives the correct order of food traveling through the digestive system after it is swallowed?

[EX Q]: Atoms of metals are good conductors of electricity because they give up electrons.
[EX A]:
Why are atoms of metals good conductors of electricity?